P0420 lexus is300

Have code read the fault and it has come back with P0420 'Catalyst System Efficiency Below Threshold Bank 1'. ... Lexus has opened pre-sales for the all-new LBX, ... Lexus Models ; Lexus IS200 / Lexus IS300 Club ; Engine & Transmission ; Dtc Code P0420 - Cat Or Lambda Sensor Theme .

Mods and experts, please correct and add on to anything you believe is incorrect. Please keep in mind this writeup is coming from a casual driver whose most advanced auto repair skill is adding air to his tires. CEL Code: P0430 Catalyst System Efficiency Below Threshold Bank 2. Step 1.What is the Cost to Diagnose the Code B1421 Lexus? Labor: 1.0. The cost to diagnose the B1421 Lexus 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.Used car dealerships will always try to minimize the number of costly repairs to maximize profit on a vehicle. The P0420 is an easily masked problem. The P0420 is what they call a "two trip" code. Meaning that exact conditions need to be met for the car's computer to test the efficiency of the catalytic converters.. and this needs to occur twice.ASE Certified Technician. High School or GED. 15,501 satisfied customers. Lexus LS430: 2002 Lexus LS430 had check engine lights on, no. 2002 Lexus LS430 had check engine lights on, no VSC light. Codes required replacement of both catalytic converters. Check engine light is off but … read more.Got this code not to long ago any advice on where to start, I’m pretty sure it’s the catalytic converter but not sure if it could be an o2 sensor??…Code P0442 Lexus Tech Notes. The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0442 code. User Submitted Video. Check if Lexus has issued a Factory Service Bulletin for the P0442 code (2013 - Up Models): → …

Lexus: Reading Trouble Codes. If the ECU has detected a system malfunction, the check engine light will blink every .5 second. The first number of blinks will equal the first digit of a two digit diagnostic trouble code and after a 1.5 second pause, the second number of blinks will equal the second digit of same diagnostic trouble code. Failed Emissions test with following 3 codes; P0420, P0430, P0446. P0420 and P0430 are Bank #1 and Bank #2 Catalytic are both below standard efficency. P0446 says the EVAP Carbon Canister is malfunctioning. Got qoute from Lexus for bank 1&2 Cat replacement $1725, for Carbon canister $585. Reset codes by battery disconnect.p0306 cyl 6 misfire. p0301 cyl 1 misfire. p0300 random misfire. Quite the line up. So far, with some tinkering under the hood, ive got the misfire codes down to just p0300 (random misfire) and p0301 (cyl 1 misfire), and the evap codes still pop up, as well as the p0420. Just typing this im seeing that the consistent cyl 1 misfire and cat bank 1 ...A P0420 code is a trouble code on OBD-II equipped vehicles. from 1996-newer sold in North America support this generic powertrain code. This code is a pretty …Allow the vehicle to run at idle until warmed up. Drive at a steady speed between 40 and 70 MPH for 10 minutes. It’s a good idea to stay in the middle of this range, so 55 MPH is optimal. It may take several attempts and warm up cycles to complete the drive cycle. 1996 to 2002 Toyota OBD II Monitor Readiness Drive Patterns.Are you looking for a Lexus dealership near you? Whether you’re in the market for a new or used Lexus, it’s important to find the right dealership that can provide you with the best service and selection. Fortunately, finding a Lexus dealer...

I have code p0302 and p0420 p0430 on my Lexus is300. There seems to be a leak from the head gasket building uP along the line of it and check engine light is on. While drivingwith the windows rolled uP the smell of gas is tracable. I need to know an estimate or the main cause for this.Mar 17, 2019 · This page is meant to help you troubleshoot the Lexus IS 300 P0430 trouble code. It covers the P0430 code's meaning, symptoms, causes, and possible solutions. P0430 is an emissions-related trouble code and is virtually never a breakdown risk. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. Table of How to replace the Bank 1 Sensor 1 O2 Oxygen Sensor on the following models. 1997-2001 Lexus ES 300, Toyota Camry 1997-2001, Toyota Solara 1999-2001 and Toyo...This time I got P0300, P1346 (VVT Sensor Rang/Performance Problem (Bank 1), and P1349 (VVT System Malfunction (Bank 1). The valve cover gaskets are sealed up perfectly, but I noticed that the cam seals (mainly the intake side) are spitting oil out. The timing belt looks great, and tension seems good. No noise either.J. jasonm4. 18192 posts · Joined 2009. #4 · Sep 1, 2011. P0440 is same as P0441, which is detection of a lack of negative pressure in the system/ (tank) and tells you to check the same things pretty much as DTC P0446. The purge/vent sensor is used to detect abnormalities in the EVAP system (charcoal canister).A few days ago the check engine light came on and started blinking. -. The engine lobes and it's seems quite likely that one or more cylinders are misfiring. -. I got the codes and they are P0300, P0303, and P0304. I did some search on the forum and it seems that most of the time the culprit is the ignition coil.

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Mods and experts, please correct and add on to anything you believe is incorrect. Please keep in mind this writeup is coming from a casual driver whose most advanced auto repair skill is adding air to his tires. CEL Code: P0430 Catalyst System Efficiency Below Threshold Bank 2. Step 1.How to Diagnose code P0440 EVAP system malfunction.Code B1423 Lexus Description. This Diagnostic Trouble Code (DTC) is output when the refrigerant pressure is either extremely low (0.19 MPa [2.0 kgf/cm2, 28 psi] or less) or extremely high (3.14 MPa [32.0 kgf/cm2, 455 psi] or more). The air conditioning pressure sensor, which is installed on the pipe of the high-pressure side, detects the ...Jan 1, 2020 · JOHN aka Eauto. self employed. High School or GED. 25,484. Lexus ES300: I have a 1999 Lexus ES 300. Three codes I am getting. I have a 1999 Lexus ES 300. Three codes I am getting are P0420, P0446 and P0171. It seems the Po446 is related to the vapor Canister.

What is the Cost to Diagnose the Code P0128 Lexus? Labor: 1.0. The cost to diagnose the P0128 Lexus 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.Aug 27, 2022 · Code P0430 Lexus Description. The Engine Control Module (ECM) uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air-fuel ratio sensor, sends pre-catalyst information to the ECM. The second sensor, the heated oxygen sensor, sends post-catalyst information to the ECM. Code B1423 Lexus Description. This Diagnostic Trouble Code (DTC) is output when the refrigerant pressure is either extremely low (0.19 MPa [2.0 kgf/cm2, 28 psi] or less) or extremely high (3.14 MPa [32.0 kgf/cm2, 455 psi] or more). The air conditioning pressure sensor, which is installed on the pipe of the high-pressure side, detects the ...Sep 3, 2010 · This time I got P0300, P1346 (VVT Sensor Rang/Performance Problem (Bank 1), and P1349 (VVT System Malfunction (Bank 1). The valve cover gaskets are sealed up perfectly, but I noticed that the cam seals (mainly the intake side) are spitting oil out. The timing belt looks great, and tension seems good. No noise either. I pulled into autozone and had the code read and got the p0420. I searched the internet and found this site. I have read nearly all of the posts regarding this code, …Labor: 1.0. To diagnose the C1246 Lexus 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.Hi, I have codes p0305, p0420, and p0430 on my 2003 lexus is300. could you please help me figure out what it might be? … read more Josh127 Master Technician Auto/Diesel Repair Degree 4,264 satisfied customers My bad ...Labor: 1.0. To diagnose the P0057 Lexus 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.California registered 2003 IS300 (158K miles) with P0420 code with check engine light on and TRAC OFF flashing. Front - Answered by a verified Lexus Mechanic We use cookies to give you the best possible experience on our website.What Does The P0420 Code Mean? The P0420 code indicates that the Engine Control Module (ECM) has identified a decline in the efficiency of the catalytic converter on Bank 1. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor.Have code read the fault and it has come back with P0420 'Catalyst System Efficiency Below Threshold Bank 1'. ... Lexus has opened pre-sales for the all-new LBX, ... Lexus Models ; Lexus IS200 / Lexus IS300 Club ; Engine & Transmission ; Dtc Code P0420 - Cat Or Lambda Sensor Theme .

Sep 13, 2023 · If any or both of these oxygen sensors fail, they can trigger the P0420 code. What is the p0420 code on a Nissan? The P0420 code means “Three-Way Catalyst Malfunction” in new Nissan models instead of “Catalyst System Efficiency Below Threshold (Bank 1).” Either way, the code indicates a decline in the catalytic converter’s performance.

Save. nightsky.fusion · #7 · Jun 2, 2017. There are actually two VSVs on the car. You found the one up front but the other one is underneath the trunk. Here's a video for replacement (definitely a PITA). For reference, I bought a severely mistreated IS300 last year that had P0440, P0442 and P0446.Yup, the CEL will turn on if you remove the primary CATs. Maybe high-flow aftermarkets would help but I don't know for sure. I heard a rumor about people making some sort of electronic simulator to trick the car into thinking that the CATs are still installed.00-05 Lexus IS300 - 3.0L 2JZ-GE - Check Engine Light ON P0420 & P0430 - Catalytic Converter Replacement Vehicle has check engine light on with trac light fla...May 19, 2011 · Usually the ecu never gives a code on a catalytic converter, but rather the o2 sensors. it seems much more logical that it is the o2 sensors than the cat. fixing the problem usually makes the light go away but not always, so resetting the computer is adviced. also, resetting the ecu would not change the way the car runs because it should be working normally, which means, if its running rich ... Lexus automobiles are designed and manufactured by Toyota Motor Corporation. Lexus is Toyota’s luxury vehicle brand, and the vehicles are manufactured in specific Lexus plants in Japan and Canada.Symptoms. The most common signs of clogged catalytic converter in Lexus RX are: limited performance above a certain speed or loss of performance, irregular running of the engine, unusual exhaust gas odor, poor fuel economy, engine check light illuminates, and sometimes rattling noises.While driving on the motorway today my check engine light came on. Scanned the code and it reads: P0420 - Catalyst System Efficiency Below Threshold Bank 1. I have new Air/Fuel Oxygen sensors …I own a bluetooth ODBII adapter so plugged it up and received the following: P0420 - Powertrain. Catalyst System Effciency Below Threshold (Bank 1) &. P0430 - Powertrain. Catalyst System Effciency Below Threshold (Bank 2) I cleared it out and it reappears within a few miles. Sometimes just one of the codes, but eventually both.

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Lexus Model: 2000 Lexus ES300. Author. Posted November 6, 2007. As previously posted, I got CEL and code came out P0420. So i replaced Cat. Converter @ 279,XXX. (Universal) Now i have 284,000 on my car. Again CEL shows up. run code through Autozone : P0420. While CEL on I was driving and light disappear.What Does the P0420 Lexus Code Mean? The Engine Control Module (ECM) uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air-fuel ratio sensor, sends pre-catalyst information to the ECM.Hello, I own a 1995 Lexus ES300 with 130,000 miles, and a 1999 Lexus ES300 with 115,000 miles. Over the past year both cars almost continually have the Check Engine light on. On the 1999 Lexus, when t … read morescanned it and got dtc code P0420 (catalyst system efficiency below threshold) i looked at some live data while at idle with engine at operating temp results: 02 sensor 1 bank 1: 0.845 to 0.75 volts.... fuel trim 0 to +8% fluctuating. 02 sensor 1 bank 2: 0.60 to 0.760 volts.....fuel trim -1.6 to +1.6 fluctuating.On 8/22/2020 at 9:04 PM, rayaans said: BTW, i'll let you know of my impressions when it arrives 😉 Its going to replace the IS300h and will only cost me £30k for a brand new car so theoretically could trade it in after a …I have a '97 Lexus ES300 (105K miles) and got a check engine light 2 days ago. I got it checked and it comes up with a P0420 code. The code description says "Catalyst System Efficiency Below Threshold (Bank 1)". As I understand, it could be due to a defective catalytic converter, damaged O2 ensors, contamination of converter due to incorrect ...jasonm4444 said: P420 B1 efficiency code should be taken care of the TS PNP. It's not related to anything else so i would verify your connections are ok and if it comes back on, i would think there's an issue with the TS delete/sim module and would contact TS. The spark plug change would not cause this code whatsoever.This time I got P0300, P1346 (VVT Sensor Rang/Performance Problem (Bank 1), and P1349 (VVT System Malfunction (Bank 1). The valve cover gaskets are sealed up perfectly, but I noticed that the cam seals (mainly the intake side) are spitting oil out. The timing belt looks great, and tension seems good. No noise either.scanned it and got dtc code P0420 (catalyst system efficiency below threshold) i looked at some live data while at idle with engine at operating temp results: 02 sensor 1 bank 1: 0.845 to 0.75 volts.... fuel trim 0 to +8% fluctuating. 02 sensor 1 bank 2: 0.60 to 0.760 volts.....fuel trim -1.6 to +1.6 fluctuating.The is has 3 different engine options with a #turbocharged I4 v6 or a 472 horse power v8. Lexus has made some exterior updates for 2023 with a new #FSport de... ….

00-05 Lexus IS300 - 3.0L 2JZ-GE - Check Engine Light ON P0420 & P0430 - Catalytic Converter Replacement Vehicle has check engine light on with trac light fla...Hi, P0446="EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL CIRCUIT" (Open or close malfunction in CCV - 2 trip detection logic). Quote. "MONITOR DESCRIPTION. The ECM tests the Evaporative Emissions (EVAP) system using the fuel tank pressure sensor, Canister Close Valve (CCV), and EVAP VSV. The ECM closes the EVAP system and creates negative ...What is the Cost to Diagnose the Code B1421 Lexus? Labor: 1.0. The cost to diagnose the B1421 Lexus 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.Lexus Model: IS300 Year: 2001 Location: Texas (TX) Posted February 8, 2012 I posted in january that I had a trouble code 1349 along with trouble codes p0440 and p0430 and misfires in all cylinders. I have had the trouble codes p0440 and p0430 for awhile but the car ran fine and a few mechanics were not able to pinpoint the problem.Sep 13, 2023 · If any or both of these oxygen sensors fail, they can trigger the P0420 code. What is the p0420 code on a Nissan? The P0420 code means “Three-Way Catalyst Malfunction” in new Nissan models instead of “Catalyst System Efficiency Below Threshold (Bank 1).” Either way, the code indicates a decline in the catalytic converter’s performance. I own a bluetooth ODBII adapter so plugged it up and received the following: P0420 - Powertrain. Catalyst System Effciency Below Threshold (Bank 1) &. P0430 - Powertrain. Catalyst System Effciency Below Threshold (Bank 2) I cleared it out and it reappears within a few miles. Sometimes just one of the codes, but eventually both.P0420 indicates a problem with bank 1 sensor 2. this is the code someone gets when there is a problem with the cat in the header [or lack thereof]. my car has headers so there are no cats in play. because the readings from the pre-cat sensor [1] and post-cat sensor [2] are the same, the ECU responds by throwing P0420.What Does The P0420 Code Mean? The P0420 code indicates that the Engine Control Module (ECM) has identified a decline in the efficiency of the catalytic converter on Bank 1. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor.Lexus Mechanic: Ron Z., - Lexus Tech - replied 11 years ago The sensor is mounted to the EVAP Canister (shown in image above-click "view full image" to get a pop-up window with a close-up view), located under the vehicle, near the fuel tank.Save. nightsky.fusion · #7 · Jun 2, 2017. There are actually two VSVs on the car. You found the one up front but the other one is underneath the trunk. Here's a video for replacement (definitely a PITA). For reference, I bought a severely mistreated IS300 last year that had P0440, P0442 and P0446. P0420 lexus is300, I have codes p0305, p0420, and p0430 on my 2003 lexus is300. could you please help me figure out what it might be? So - Answered by a verified Lexus Mechanic. ... My 2002 Lexus is300 was making weird grinding noises as I turned the wheel, both while moving and still., Hi, love this site. Have a 2000 Lexus GS300, P0420 code popped up. Car runs great, no discernible performance difference, no strange noises, etc. P0420 Catalyst System Efficiency Below Threshold Bank 1 This car has a new MAF, replaced on a whim to trouble shoot a recent misfire issue., Hi guys, First of all, oil change was not overdue, it was right on 5000 miles mark. I noticed some power loss when I pressed gas so thought may need oil change soon. Then all of a sudden after driving 20 miles, check engine light came on. Took it for an oil change, power felt a lot better than be..., Lexus Cars & Trucks parts change code p0430 causes car rock, IS300 Build [Ep.22] "Fixing my Check Engine Light code P0420 and P0430. If you are interested in buying the EVO resurrection Project car or The IS300 build project car, hit me upon …, Dec 22, 2018 · Lexus IS 250 / Lexus IS 250C Club / Lexus IS 220D & IS 200D Club ; P0420 - Catalyst System Efficiency Below Threshold Bank 1 Theme . IPB 4.6 . IPB 4.7 Theme (Default) , Labor: 1.0. To diagnose the C1201 Lexus 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., Labor: 1.0. To diagnose the P0120 Lexus 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., I got an IS300 2004 Lexus keep giving me P0420, TRAC OFF code every 200 miles. question, how can i solve this? - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website., Feb 8, 2012 · First Name:Lukas. Lexus Model: Is300. Year: 2002. Location: South Dakota (SD) Posted September 23, 2014. those codes are for the catalytic converters: p0420-bank 1 cat, p0430-bank 2 cat, p0440 is the cat in the y-pipe. Dont recommend using sims which can cause further issues down the road, when i got those codes, i replaced the cats with ... , Found the tank leak for the p0440 and p0446 codes., Whats up guys welcome back! Today we are fixing code p0442 evaporative emissions system leak ( Small leak ) With the culprit being Check valve. Enjoy! Like, ..., The codes seemed to point to the bank 1 sensor 1, O2 sensor (P1130 and P1135). When I searched this forum, everything I saw said that it's near the firewall verses being on the radiator side of the engine. I called the repair shop to see if it really was the O2 sensor and to see if it was ready for pick-up., Lexus IS300: Hi, I changed the sensor 2 bank 2 o2 sensor friday Hi, I changed the sensor 2 bank 2 o2 sensor friday and the check engine light went off as soon as i got 100 miles it came back on. What would cause this? the car is a 2001 Lexus is300 …, Used car dealerships will always try to minimize the number of costly repairs to maximize profit on a vehicle. The P0420 is an easily masked problem. The P0420 is what they call a "two trip" code. Meaning that exact conditions need to be met for the car's computer to test the efficiency of the catalytic converters.. and this needs to occur twice., What Does the P0420 Lexus Code Mean? The Engine Control Module (ECM) uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air-fuel ratio sensor, sends pre-catalyst information to the ECM., A few days ago the check engine light came on and started blinking. -. The engine lobes and it's seems quite likely that one or more cylinders are misfiring. -. I got the codes and they are P0300, P0303, and P0304. I did some search on the forum and it seems that most of the time the culprit is the ignition coil., Lexus IS300: Hi, I changed the sensor 2 bank 2 o2 sensor friday Hi, I changed the sensor 2 bank 2 o2 sensor friday and the check engine light went off as soon as i got 100 miles it came back on. What would cause this? the car is a 2001 Lexus is300 …, greetings from the lost and confused. my son has a 2003 is300. he has been getting a P0420 code (check enging light is on). the local dealership has stated it's a Cat conv, but they can't be sure which one, so they will have to replace all three. (they haven't seen the vehicle sounds bogus to me. he has ~120k miles. I think the problem may be more o2 sensor related. can you clue me in on what ..., Bucks and jerks will not go over 40 MPH, has p0300, p0305, p0306, p0125, p0420, p1325 - Answered by a verified Lexus Mechanic We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them., Oxygen sensor (Problem P0420 on the OBDII controler)The oxygen sensor is a device which determines the oxygen content of the exhaust gas. Since the amount of..., Here's how to modify your car's oxygen sensor to get rid of a P0420 OBDII code, clear the check engine light and pass an emissions test.The P0420 code is thr..., 6 months ago I bought my 2002 lexus is300, my car started to struggle shifting from 1st to 3rd, by letting off the throttle it would help shift. After a couple months I started hearing crackling noises, I wasn’t to sure if it was the pulleys pulling the serpatine belt or something else. Anyways..., scanned it and got dtc code P0420 (catalyst system efficiency below threshold) i looked at some live data while at idle with engine at operating temp results: 02 sensor 1 bank 1: 0.845 to 0.75 volts.... fuel trim 0 to +8% fluctuating. 02 sensor 1 bank 2: 0.60 to 0.760 volts.....fuel trim -1.6 to +1.6 fluctuating., The Lexus is an automobile that is produced by Toyota. The Lexus LS 400 and the ES 250 debuted in 1989 as the first in a series of Toyota luxury vehicles. Following its entry into the U.S., Dec 9, 2017 · If you are interested in buying the EVO resurrection Project car or The IS300 build project car, hit me upon IG @initialized_frsToday we are fixing my check ... , Lexus IS 250 / Lexus IS 250C Club / Lexus IS 220D & IS 200D Club ; P0420 - Catalyst System Efficiency Below Threshold Bank 1 Theme . IPB 4.6 . IPB 4.7 Theme (Default), diehard: The check engine light came up on m car too, a lexus ES300. Scanned it and this same code came on, but on bank 2. Not sure where bank 2 is. Somebody advised me to change the catalyst converter. I read somewhere that the back O2 sensor are the ones that actually send signals used to determine the efficiency and …, The P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. A lean condition occurs when the engine either receives too little fuel or too much air. October 10, 2018. This article applies to the Lexus IS, RX, GS, LS, and ES (2005-Present), Lexus Model Forums. RX Models. RX - 1st Gen (1999-2003) Oxygen Sensor (O2) Bank 1, Sensor 2 DIY; RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models 12-16-14, 12:36 PM How-Tos on this Topic Last edit by: IB Advertising. See related guides and technical advice from ..., According to the normal Lexus service schedule, the muffler, exhaust pipes, and mountings need to be inspected for cracks, deterioration, and damage at 105000mi or 168000km or every 18 months, whichever occurs first. Will a bad 1999 Lexus RX300 muffler cause a rattling sound from the wheel bearing?, , Now for the Causes for these codes: Common Problems That Trigger the P0171 and P0174 Code. PCM software needs to be updated. Vacuum leaks (Intake Manifold Gaskets, vacuum hoses, PCV hoses, etc.) Mass Airflow Sensor (MAF) Plugged Fuel Filter or weak Fuel Pump. Plugged or dirty Fuel Injectors.