P25a2 chevy volt

P1000 – P1099 (Fuel and air metering and auxiliary emission control) P1011. Intake camshaft position (CMP) actuator, bank 1 -incorrect park position. Engine oil level/pressure, mechanical fault. P1012. Exhaust camshaft position (CMP) actuator, bank 1-incorrect park position. Engine oil level/pressure, mechanical fault. P1013.

Sep 9, 2023 · Source: bing.com The P25A2 code is a diagnostic trouble code (DTC) that is related to the exhaust system of the Chevy Silverado 2020. Specifically, it indicates that there is an issue with the particulate matter sensor circuit. The particulate matter sensor is responsible for detecting the amount of particulate matter (PM) in the exhaust system. May 26, 2021 · Hi, was in a dusty parking lot yesterday with my 2016 volt (has about 55,000 miles). On the way home got a check engine light. I scanned for codes when I got home. Got C0506 and P25A2. 12 Volt battery … read more Select a make to see its TSBs that are related to DTC P25A2. Land Rover; Cadillac; Chevrolet; GMC; DTC P25A2 has been discussed in the following consumer complaints. 2019 Chevrolet Silverado 1500 Brake Consumer Complaints Details … 2019 Chevrolet Silverado 1500 Brake Consumer Complaints Details … 2019 GMC Sierra 1500 Brake Consumer ... If you are in the market for a reliable and stylish rental car, Chevy has a range of options to suit your needs. From compact cars to SUVs, Chevy has a car rental model to fit every lifestyle.P1000 – P1099 (Fuel and air metering and auxiliary emission control) P1011. Intake camshaft position (CMP) actuator, bank 1 -incorrect park position. Engine oil level/pressure, mechanical fault. P1012. Exhaust camshaft position (CMP) actuator, bank 1-incorrect park position. Engine oil level/pressure, mechanical fault. P1013.

What Does the Engine Code P25A2 Mean? Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "2" in the second position means that this is a ISO/SAE controlled OBD-II (OBD2) DTC. "5" in the third character position in a DTC indicates that the vehicle speed, idle control and auxiliary inputs is experiencing a malfunction.19-86 all-electric miles. $10K - $30K. 4.8/ 5. The Chevy Volt is a hybrid electric plug-in vehicle that is EPA-rated for either 38 or 53 miles of all electric range when new, depending on model year. Chevy considers the Volt an extended range electric, but it is commonly referred to a “series” hybrid, meaning that it runs on exclusively ...One of the two AAT wires receives about 4.6 volts from the ECM/PCM, Instrument Cluster, Body Computer, etc. and the other wire is a reference ground, also from the module the sensor reports to. The reason it’s slightly less than the 5 volts delivered to three wire sensors is that there is a resistor inside the ECM/PCM on each two-wire …Here is the contact info for the class action. They’ve been great. Volt owners with BECM issues contact our firm ( (615) 254-8801) or Matt Alison’s firm, The Indian and Environmental Law Group, PLLC ( (918) 347-6169). If you are an engineer, then you should understand the realities of complex product development.Find the best Chevrolet Volt for sale near you. Every used car for sale comes with a free CARFAX Report. We have 303 Chevrolet Volt vehicles for sale that are reported accident free, 157 1-Owner cars, and 441 personal use cars.Was in a dusty parking lot yesterday with my 2016 volt (has about 55,000 miles). On the way home got a check engine - Answered by a verified Chevy Mechanic. ... Got C0506 and P25A2. 12 Volt battery was changed about 3 months ago and just …The Volt is 16 inches longer than the Bolt but surprisingly, the Bolt has 95 cubic feet of interior space, compared with 90 cubes for the Volt. Similarly, the Volt has about 10 cubic feet of cargo space normally—which expands to 30 with the back seats folded down—while the Bolt has 17 and 57, respectively. Further, the Volt’s battery ...

GM has recalled 463,995 cars and trucks in the US, including the 2019 Chevrolet Silverado and GMC Sierra, due to faulty electronic brake control software. Including the 2019 Chevy Silverado, GMC ...The cost to diagnose the P25A2 2018 Chevrolet Silverado code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. Search for P25A2 2018 Chevrolet Silverado Questions and ...P25a2 U0146 U0101 U0100 mil status- off freeze frame dtc- U0146 i had an oil change done by hare chevy in noblesville 2 weeks ago, never an issue with my truck until after i left the dealership. Stanley chevy in mccordsville looked at it this morning and said they have to order a bunch of parts for it, including new leaf springs for a truck ...www.gm-volt.com From my receipt: Code engine P25A2 caused by C05b1 and C0574 Part 84309575 SLN module kit Part 84570256 Module Part of the following campaign: C/S N202307990 Increase customer notifcation Reprogrammed hpcm2 cbyn89618968

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April 15, 2020– Added GMC Sierra and Chevrolet Silverado to Models. May 29, 2020– Added DTCs P0606 with C0021, C05D2, C0595, C2A3B, C0024, C053D. September 22, 2020 – Added DTC P25A2 to the Subject and Condition, updated the Involved Region or Country section and updated the programming procedure template.To diagnose the P25A2 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.Chevy Volt Forums. Generation 2 Chevy Volt (2016-2020) My new VOLT has a problem tonight 07-12-2016. 9859 Views ...The Volt has also been a money-loser for GM. The additional equipment needed to make a plug-in hybrid is expensive, while GM committed to making the Volt price-competitive at around $35,000. GM ...Code P25A2 Chevrolet Description Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. If a condition is detected, the module sets a Diagnostic Trouble Code (DTC) and sends a serial data …Choosing a certified pre-owned (CPO) Volt is one way to get a pre-owned Volt. Chevrolet’s CPO program applies to vehicles that are less than six years old, have fewer than 75,000 miles, and ...

2021 Chevrolet Silverado. 2022 Chevrolet Silverado. B0012 2014 Chevrolet Silverado 📷 373 Views. Driver Steering Wheel Air Bag Deployment Loop Stage 1. B0012 2015 Chevrolet Silverado 📷 183 Views. Driver Steering Wheel Air Bag Deployment Loop Stage 1. B0012 2016 Chevrolet Silverado 📷 243 Views.Silverado 1500. 104,000 miles. A D V E R T I S E M E N T S. The contact owns a 2019 Chevrolet Silverado 1500. The contact stated while driving 60 MPH, the vehicle lost motive power with the engine ...I just purchased a 2017 Volt and about 100 miles in my check engine light came on. when I ran the codes, this is what came up. 1/6 U0073 (CAN Bus Communication) 2/6 P0AC4 Hybrid Powertrain Control Module 3/6 P25A2 (Brake system control module 1) 4/6 P25C9 (Brake Control module 2)...P1000 – P1099 (Fuel and air metering and auxiliary emission control) P1011. Intake camshaft position (CMP) actuator, bank 1 -incorrect park position. Engine oil level/pressure, mechanical fault. P1012. Exhaust camshaft position (CMP) actuator, bank 1-incorrect park position. Engine oil level/pressure, mechanical fault. P1013.p25a2 c05ad codes on a 2017 volt braking is kinda sluggish as well where i'm having to push the foot way farther than i should to brake. 1yr old 12v that load tested at sams fine. What else should i check for code comes back after 100ish miles. • C05AD: "Brake Blending Performance" and appears to indicate incorrect hydraulic pressures in the ...What Does the P25A2 Chevrolet Code Mean? ChatAC AutoCodes.com AI Chat What does this mean? What are the Possible Causes of the DTC P25A2 Chevrolet? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Check Brake System Control Module for codesImportant: For 2013-14 Buick Lacrosse, 2013-14 Buick Regal, 2014 Chevrolet Impala E, or 2013-14 Chevrolet Malibu, If the wheel bearing encoder ring is damaged, replace the wheel bearing and follow Bulletin 16-NA-348. Caution: Take care not to damage the bearing outer seal when brushing and/or cleaning the magnetic encoder debris.When the problem has been diagnosed, have the in-network facility call SilverRock to start the claim The in-network facility should call 866-628-3905 for approvals before any repairs have started. Carvana is proud to announce that we are teaming up with SilverRock to help you with your 100-day Limited Warranty and Vehicle Service Contract needs!To spur interest and make the Bolt more affordable, GM cut the starting prices by as much as $6,300 for the 2022 model year. The Bolt EV would start at $26,595, followed by the Bolt EUV at $28,195 ...Chevrolet Volt. Change car Make. Model. Year. Update. Change car. Popular competitors: Hyundai IONIQ Plug-In Hybrid; Chevrolet Bolt EV; Ford C-Max Energi; Chevrolet Volt; 2019. Volt – 9 Model ...

Source: bing.com The P25A2 code is a diagnostic trouble code (DTC) that is related to the exhaust system of the Chevy Silverado 2020. Specifically, it indicates that there is an issue with the particulate matter sensor circuit. The particulate matter sensor is responsible for detecting the amount of particulate matter (PM) in the exhaust system.

Watts cannot be calculated using the number of volts alone. Amperage is required, too. To find how many watts are in 120 volts, one need to know the formula that relates power (P) in watts to volts (V) and current (I) given in amps.What does this mean? What are the Possible Causes of the DTC P25A2? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Check Brake System Control Module for codes Faulty Brake System Control Module ⚠ Does your Car have How to Fix the DTC P25A2?Important: When programming a module in GM’s new Vehicle Intelligence Platform, or VIP, the power mode (ignition) needs to be off or errors may occur. This involves the 2020 Chevrolet Corvette, Cadillac CT5 and CT4, as well as the upcoming full-size Chevrolet, GMC, Cadillac SUVs and Buick Envision. Serial Data Message Authentication also ... Code P25A2 Chevrolet Description Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. If a condition is detected, the module sets a Diagnostic Trouble Code (DTC) and sends a serial data …When checking for DTCs, the Engine Control Module (ECM) will set P25A2 indicating that the BSCM (Brake System Control Module) has set DTCs. The BSCM will have set any combination of multiples of the following communication DTCs. DTCs can be set current …One month with the car and everything was working good until now that the snow hit hard in Michigan. 2017 Volt LT Check Engine came on, throw code P25C9, I cannot find a lot of information related to it. Took it to the dealership and of course the light went off. They cannot replicate the issue... The worst model years of the Chevy Volt are 2012, 2013, and 2017. General Motors has produced more good years than bad ones of this plug-in hybrid, but there have been issues. Complaints have included the failure of the BCM, airbag issues, braking problems, and shift to park warnings on the dash. When General Motors introduced the Chevy Volt in ...Labor: 1.0. The cost to diagnose the P25A2 GMC code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

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Chevrolet Silverado 1500 2019 - 2020 All All All All GMC Sierra 1500 2019 - 2020 All All All All Involved Region or Country North America Condition Some customers may comment of a SES MIL at start up or shortly after start up. When checking for DTC's, the ECM will set a P25A2 indicating that the BSCM (Brake System Control Module) has …Silverado 1500. 104,000 miles. A D V E R T I S E M E N T S. The contact owns a 2019 Chevrolet Silverado 1500. The contact stated while driving 60 MPH, the vehicle lost motive power with the engine ... Chevrolet Volt Premier: The Premier trim comes with leather upholstery, a power-adjustable driver's seat, heated front and rear outboard seats, and a heated steering wheel. It also has tech features like automatic parking assist, front and rear parking sensors, wireless phone charging, an eight-speaker Bose premium audio system, and a 7.2-kWh …Important: When programming a module in GM’s new Vehicle Intelligence Platform, or VIP, the power mode (ignition) needs to be off or errors may occur. This involves the 2020 Chevrolet Corvette, Cadillac CT5 and CT4, as well as the upcoming full-size Chevrolet, GMC, Cadillac SUVs and Buick Envision. Serial Data Message Authentication also ... What Does the P25A2 Chevrolet Code Mean? ChatAC AutoCodes.com AI Chat What does this mean? What are the Possible Causes of the DTC P25A2 Chevrolet? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Check Brake System Control Module for codesGM has recalled 463,995 cars and trucks in the US, including the 2019 Chevrolet Silverado and GMC Sierra, due to faulty electronic brake control software. Including the 2019 Chevy Silverado, GMC ...What Does the P25A2 Chevrolet Code Mean? Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. If a condition is detected, the module sets a Diagnostic Trouble Code (DTC) and sends a serial data message to the Engine Control Module ( ECM ). 16K subscribers in the volt community. Chevy Volt news and discussion. Coins. 0 coins. Premium Powerups Explore Gaming ... C0513 and P25A2 while driving ?? Happened ...2017 Volt Code P25A2 C050C ABS, check engine, and stabilitrack lights are on. I'm having an issue with my 2017 Volt premier, the codes that show indicate a LH rear wheel speed sensor. I've changed the sensor, no fix. I swapped the wheel hubs to see if the fault would follow over to the right side, still showing C050C for LH rear wheel speed sensor.29 posts · Joined 2017. #1 · Nov 18, 2018. Hello, Check Engine light came on Volt 2017 Gen 2.. Using OBS2 diagnostic tool it had 5 "unknown" codes: POD 3E, P25a2, Co513, Co515, Co516. ….

Feb 4, 2011 · Since the ECM is really the only module permitted to turn "ON" the Check Engine/ Malfunction Indicator Light due to OBD2 regulations. When the HPCM detects a system problem it essentially "tells" the ECM to set the P0AC4, basically JUST to turn on the MIL. So this code is always set in combination with some other DTC. Home DTCP25A2 Code: P25A2 System: Powertrain (Covers functions that include engine, transmission and associated drivetrain accessories) Category: ISO/SAE (It is core DTCs and applied to most manufacturers. A common fault message is assigned to this code.) …Volt. 2019. When receiving the ODB code p1e00 on Your Chevy Volt, You are likely experiencing an issue with the battery. Generally, that sequence indicates a generic electrical system problem. The message is almost always found concurrently with at least one other. Often, in this situation, Volt owners report that the car will not hold a charge ...It took nearly four more years, but the first Volt — a longer-range version of a plug-in hybrid — rolled off the assembly line late in 2010. GM had hopes that customers would be ready for a ...Jan 19, 2023 · 2017 CEL Flashing, Engine Shaking (on Freeway) - P0301, P25A2, P059F, U0100. About a month ago, I was driving the car on the freeway and had put it on Hold mode to preserve battery range (and keep myself warm because winter), and after about 30 seconds or so, the CEL came on and began flashing at me. Description of Fault code P25A2. Possible failuer P25A2 Diagnostic Procedure using AutoHex II Scan Tool Test Conditions using AutoHex tester Clear Fault codes Conditions 8 yr./100,000 mile battery limited warranty†. Roadside Assistance. 24/7 toll-free assistance for 8 years or 100,000 miles†. Included Maintenance. Your first maintenance visit is covered†. EV BENEFITS. Learn how Chevrolet is committed to making electric vehicles accessible to all through constant growth in innovation, technology, and EV ...Garage Opel Chevrolet reviews 3. Sort by: date highest rated lowest rated most helpful. Tarik. 08 June 2018 1:12. Situé rue omar slaoui, angle mers sultan à Casablanca. Le Garage Opel Chevrolet est avant tout un concessionnaire automobile D'Opel Chevrolet et Suzuki. P25a2 chevy volt, The 2021 lt trail boss with the 5. 3l engine started a really rough idle, engine knocking, random misfiring, had service emergency brake, service esc messages on the display, check engine light and several other dash warning lights. The dealer diagnosed the truck with lifter fail apart (failure), intake valve push rod bent, and pcm failure., Re: Coolant bypass valve part defective part #13529523 on my 2019 Chevy Volt.. I included a picture of the repaired cable, when this did not resolved engine code P26A8 The dealer then replaced the defective Coolant bypass valve. My out of pocket cost was $331.31 including a $76 discount for the refused under warranty part and repair. 1., How to fix C0505 P25A2 Shevrolet tahoe 2021 check engine abs light and traction light., The following three warnings appeared on the instrument panel: 1) brake system failure 62 mph top speed, 2)service trailer brake system, 3) service esc abs, brake, traction control, and check engine lights illuminated. I turned the vehicle off and turned it back on again using the ignition button and all warnings and lights cleared except the ..., Labor: 1.0. To diagnose the P25A2 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., Some customers may comment of a SES MIL at start up or shortly after start up. When checking for DTC's, the ECM will set a P25A2 indicating that the BSCM (Brake System Control Module) has set DTC's. The BSCM will have set any combination of the following communication DTC's: U0146 U0100 U0101 U0140 U0151 U026A U0131 and/or U0422., I just purchased a 2017 Volt and about 100 miles in my check engine light came on. when I ran the codes, this is what came up. 1/6 U0073 (CAN Bus Communication) 2/6 P0AC4 Hybrid Powertrain Control Module 3/6 P25A2 (Brake system control module 1) 4/6 P25C9 (Brake Control module 2)..., What does this mean? What are the Possible Causes of the DTC P25A2? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Check Brake System Control Module for codes Faulty Brake System Control Module ⚠ Does your Car have How to Fix the DTC P25A2?, When checking for DTCs, the Engine Control Module (ECM) will set P25A2 indicating that the BSCM (Brake System Control Module) has set DTCs. The BSCM will have set any combination of multiples of the following communication DTCs. DTCs can be set current …, First, if Chevy reuses codes, P25A2 is brakes/ABS issue (on a 2017 Camaro.) P25A2 Brake System Control Module Requested MIL . And C0501 is I believe “Steering assist control solenoid/motor/actuator return circuit malfunction” And the award for the stupidest …, The following TSBs of Cadillac are related to DTC P25A2. 2020 Cadillac CT4 Adaptive Mobility Equipment TSB Details …. 2020 Cadillac CT4 Electrical System TSB Details …. 2020 Cadillac CT4 Forward Collision Avoidance Sensing System Camera TSB Details …., Since the ECM is really the only module permitted to turn "ON" the Check Engine/ Malfunction Indicator Light due to OBD2 regulations. When the HPCM detects a system problem it essentially "tells" the ECM to set the P0AC4, basically JUST to turn on the MIL. So this code is always set in combination with some other DTC., Source: bing.com The P25A2 code is a diagnostic trouble code (DTC) that is related to the exhaust system of the Chevy Silverado 2020. Specifically, it indicates that there is an issue with the particulate matter sensor circuit. The particulate matter sensor is responsible for detecting the amount of particulate matter (PM) in the exhaust system., Hi - our 2016 Volt w 76K miles recently had the BECM replaced, then the EGR valve and cooler replaced. Fortunately these were fixed under warranty. Then we replaced the tires. Less than a week later the check engine light appeared a few times with P25A2 and later P1E00 and P25A2 codes. This car is driven by my daughter in Santa Maria, CA who ..., General Motors GM OEM Axle Assembly Washer 11611964 NOS. Be the first towrite a review. everettchevroletbuickgmc (2136) 99.2% positive feedback. Price: $6.05. Free shipping. Est. delivery Thu, Sep 21 - Sat, Sep 23., Hi, was in a dusty parking lot yesterday with my 2016 volt (has about 55,000 miles). On the way home got a check engine light. I scanned for codes when I got home. Got C0506 and P25A2. 12 Volt battery was changed about 3 months ago and just had oil change etc....3 weeks ago. Usually check engine is emissions? I’m heading out of town tomorrow. , What Does the Engine Code P25A2 Mean? Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "2" in the second position means that this is a ISO/SAE controlled OBD-II (OBD2) DTC. "5" in the third character position in a DTC indicates that the vehicle speed, idle control and auxiliary inputs is experiencing a malfunction. , That C0507 code I had was what directed me to my FR wheel, each has its own unique code. You can also get codes from Onstar if you have it (or start/restart a trial). Once you know which wheel, you'll need to check your Wheel Speed Sensor first (easy). Pop the wheel off, its the black cable going down near the hub., Nov 16, 2021 · www.gm-volt.com From my receipt: Code engine P25A2 caused by C05b1 and C0574 Part 84309575 SLN module kit Part 84570256 Module Part of the following campaign: C/S N202307990 Increase customer notifcation Reprogrammed hpcm2 cbyn89618968 , Automated email: An issue with the StabiliTrak® stability control system in your 2016 Chevrolet Volt has been detected. Please service your vehicle within 7 days. Requested email: The code(s) and explanation(s) associated with this issue is/are: P25A2 The …, 5 15 comments Add a Comment pugworthy • 4 yr. ago Google shows a few references... First, if Chevy reuses codes, P25A2 is brakes/ABS issue (on a 2017 Camaro.) P25A2 Brake System Control Module Requested MIL And C0501 is I believe "Steering assist control solenoid/motor/actuator return circuit malfunction", Not an identical situation but worth a try - To reset the brake warning, with foot off the brake pedal, push the start button and hold it in for 30 seconds or so. This effectively turns on all electrical systems without running the motor. Keeping the start button pressed, push down hard on the brake pedal and keep it down until the clicking ..., My chevy Silverado has almost 40k miles and the engine line just came on. When I read the codes it says it's a U1056 ("lost communication with gateway A") and a secondary P25A2 ("Brake system control module 1 requested Mil illumination")., What's the p25a2 code? 5 comments Best Add a Comment SnazzyInPink • 2016 Premier • 4 yr. ago • Edited 4 yr. ago I need to know more. I literally JUST got this code when I went to move my car. Called Onstar and they gave me this code with the following summary: ECM - Engine System The Engine and Transmission System is not performing as expected. , Chevrolet will cover standard installation of Level 2 (240-volt) charging outlet for eligible customers with the purchase or lease of a 2023 Bolt EV. Imagine the convenience of faster charging for your electric vehicle, right from your own home. Locate more than 40,000 compatible charging stations near you, or use the locator map to plan your ..., ^ a b "Chevy Volt Delivers Novel Two-Motor, Four-Mode Extended Range Electric Drive System; Seamless Driver Experience Plus Efficiency". Green Car Congress. 2010-10-20. Diakses tanggal 2010-10-21. ^ a b c "2011 Chevrolet Volt Road Test Specs". Edmunds.com. Diakses tanggal 2011-06-05. ^ a b Frank Markus (2011-04-13). "Arrival: …, Generation 1 Chevy Volt (2011-2015) Problems, Driver Warnings or DTCs - Gen ... What is the Cost to Diagnose the Code P25A2 Chevrolet? Labor: 1. No Reverse ..., ( http://www.TFLcar.com ) The 2016 Chevy Volt is all new and ready to take GM to the next level of hybrid drive. Unlike traditional hybrid the new 2016 Chev..., 2. Using a Digital Volt Ohm Meter (DVOM), select millivolt (mV). 5341449 3. Utilizing an alligator clip or equivalent, apply the positive DVOM lead to the positive cable (B+) stud (1). 4. With the vehicle in PARK and the parking brake set, start the vehicle. ⇒ Allow the engine to idle. Note: The fuses in the X50A Fuse Block may appear, My dashboard ABS and Engine Light came on. Upon further research, codes P25A2, C0500, and C0501 were triggered. I have seen some... in this thread in this sub-forum in the entire site. Advanced Search Cancel Login / Join. What's New; ... Chevy Volt Forums. Generation 2 Chevy Volt (2016-2020) Problems, Driver Warnings or DTCs - …, The first model year of the Chevrolet Volt is celebrating its 10th birthday in 2021, which means there are now plenty of used Volts with hybrid systems and battery packs that have gone through the ..., Silverado 1500. 104,000 miles. A D V E R T I S E M E N T S. The contact owns a 2019 Chevrolet Silverado 1500. The contact stated while driving 60 MPH, the vehicle lost motive power with the engine ..., Since the ECM is really the only module permitted to turn "ON" the Check Engine/ Malfunction Indicator Light due to OBD2 regulations. When the HPCM detects a system problem it essentially "tells" the ECM to set the P0AC4, basically JUST to turn on the MIL. So this code is always set in combination with some other DTC.