Question about 2001 Chevrolet Impala

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Impala code p1404 p0300 p0128

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Posted on Jan 02, 2017

  • 43 Answers

SOURCE: P0128 code

Unless the car is overheating you probably just have a bad temperature sensor probably located on the intake manifold....

Posted on Apr 03, 2009

Testimonial: "i replaced the coolant temp. sensor and every thing is o.k. Thank's for the help. Your advise was right on."

johnjohn2
  • 5763 Answers

SOURCE: Chevy Impala 2001 w/ 3.8L engine - EGR stuck open

there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.

Posted on Nov 28, 2009

  • 1915 Answers

SOURCE: I have a 2004 Chevcy

Starting with the P0128, the temp that the engine computer will affect the settings it makes to your engine-that particular code specifically means that the ECU thinks the engine is running too cold-and it is telling you that by tripping a P0128. Check to see if your coolant temperature sensor is connected, or just replace it-they are not expensive (usually less than $15).

The P1811 is a manufacturer's specific code, and it means it has a faulty Pressure Control Solenoid, GM knows about it, there are TSB about it. Harsh shifts when hot. The best and cheapest thing to do is call GM and complain. Their number is 1-800-222-1020. These transmissions are known to be defective but have yet to be recalled. You can try a trans service and it might solve it, if you haven't had one done you should do it ASAP. Another thing you can try is to disconnect the battery, both terminals, and hold/tape the clamps together for at least 10 minutes, then reconnect them, start it up and let it idle for about 6-8 minutes, then gently drive it for another 10 minutes-all your sensors will 'relearn' and it might solve this problem.

The P0300 is a random misfire-who knows what caused that, have you done a tuneup lately (or at all?)- Your coolant leak needs to be found, and that can be done using a pressure tester on the cooling system-with the engine cold, you pressurize the cooling system and watch the gauge-it will drop if there is a leak, and it needs to be found. If you are lucky, it is a hose, but it could be the radiator or heater core, or internal to the engine (head gasket)-not good and expensive. These testers can be 'rented' for free at most commercial auto parts stores.

Posted on Jul 01, 2011

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We have a 1998 GMC Jimmy displaying error codes P0300 and P1404. It idles rough and backfires.


P0300 means it is misfiring - duh.
P1404 mean the EGR valve is suspect.

Oct 09, 2013 | GMC Jimmy Cars & Trucks

1 Answer

My 02 grand am gt is acting up engine light is on went to autoparts store to get it checked out it threw codes p1404, p0404 and p0300 i already changed the egr valve twice and it wont help can someone plz...


code p0404 refers to Exhaust gas recirculation system (EGR)--range performance problem--- causes---hose leakage--wiring---EGR valve/solenoid
code p0300 refers to random/multiple cylinder/s ---misfire detected.---causes---spark plugs---ht leads---injectors--ignition coils---low compression ---wiring. Remember it is best to use genuine sensors/solenoids as the cpu is set to them. Try changing the egr solenoid

PLEASE RATE THIS REPLY FOR ACCURACY

Mar 24, 2013 | 2000 Pontiac Grand Am GT

1 Answer

Error code P0128


Trouble Code: P0128

Thermostat Range/Performance

Trouble Code Conditions: DTC P0107, P0108, P0112, P0113, P0116-118, P0335, P0336, P0300-P0306, P0401, P0505, P1106-P1108, P1259 and P1519, engine running at road load for 10 minutes, and the PCM detected the ECT sensor input did not reach the correct closed loop value. Note: It is possible for this code to set if the engine is left running while the hood is open for an extended period in a warm climate.

Possible Causes:


Inspect for low coolant level or for an incorrect coolant mixtureCheck the operation of the thermostat (it may be stuck open)TSB 01-064 (9/11/01) contains a repair procedure for this code

Jan 27, 2013 | 2001 Honda Civic 1.7

1 Answer

P1404 code and p0420 car stalls


The P1404 means Driver Power Window Down Circuit Open
and the P0420 means Catalyst System Efficiency Below Threshold (Bank 1)
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hid xenon headlight

Sep 18, 2012 | 2001 Chevrolet Impala

1 Answer

I am getting codes PO 128, PO 300 and PO 506 on my chevy Impala, 2002, LS 3.8


code P0128 ECT ( electronic coolant temperature ) engine temperature to low ( replace thermostat ).

code P0300 engine miss fire detected ( replace spark plugs and spark plug wires )

code P0506 IAC ( idle air control ) system idle to low ( clean the IAC valve if problem persists replace the IAC valve )

Apr 15, 2011 | 2002 Chevrolet Impala

1 Answer

Radiator fans fuses keep blowing-chevy impala 2002. we need info on following codes: P0108, P0128, P 0341, P 0401, P 0420, P 1480, and P 1481. John


p0108 map curcuit high input, p0128 coolant temperature below thermstat regulating tempurature, p0341 is camshaft position sensor A-bank 1 ckt range/performance, p0401 is exhaust gas recirculation, insufficiant flow detected, p0420 is catalyst system efficiency below threshold, p1480 is manufacturer control auxilary emission controls, p1481 is same as p1480.

Jun 15, 2010 | 2002 Chevrolet Impala

1 Answer

Chevy Impala 2001 w/ 3.8L engine - EGR stuck open


there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.

Nov 28, 2009 | 2000 Chevrolet Impala

3 Answers

2006 pont grand prix when car gets warm it starts misfiring i will scan it code po300 comes up and code po 128


P0300 is a code for multiple misfire. Which could be created to the P0128
P0128 PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat.
A code P0128 may mean that one or more of the following has happened:
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty cooling fan (running too much)
  • Faulty coolant temperature (ECT) sensor
  • Faulty intake air temperature (IAT) sensor
Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:
  • Verify coolant strength & level
  • Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
  • Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
  • Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
  • If the above items check out good, replace the thermostat
Good luck and hope this helps. keep me posted, be glad to know your car is running 100% again soon.

Nov 04, 2009 | 2006 Pontiac Grand Prix

1 Answer

P0128 code


Unless the car is overheating you probably just have a bad temperature sensor probably located on the intake manifold....

Apr 03, 2009 | 2002 Chevrolet Impala

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