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I have 4 codes that came up on my 2005Chevy impala, PO 128,PO336,PO38,and PO 386can anyone tell what these are?

Posted by Don Mathews on

  • Don Mathews
    Don Mathews Oct 17, 2015

    I misspelled one code it is PO 385

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1 Answer

Jason Smith

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  • Cars & Trucks Expert
  • 182 Answers

P0038 - HO2S Heater Control Circuit High Bank 1 Sensor 2
P0128 - Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)
P0336 - Crankshaft Position Sensor Circuit A Range/Performance
P0386 - CKP Sensor B Circuit Performance.
your most likely need to replace the crankshaft sensor and probably will take care of the 0336 and 0338 codes.
you then need to check your coolant level, if low fill and look for leaks, if not low, most likely replacing the thermostat will correct other two codes

Posted on Oct 17, 2015

  • 2 more comments 
  • Don Mathews
    Don Mathews Oct 17, 2015

    I replaced my water pump. Now you say engine cranck sensor should solve the other 2 codes. Where would i look for this? And thank you!

  • Jason Smith
    Jason Smith Oct 17, 2015

    yeah the crank sensor should fix your other two codes, and if you replaced the water pump after you replace the crank sensor, you can go to autozone or advance and they will come clear the codes out of the computer for you, and if your check engine light comes back on, let them rescan and if it is the coolant codes again...you will probably need to replace the thermostat. I found a short video that will show you something I was going to suggest you look at the wires that go to the crank sensor, they could be the problem not the actual sensor, but you can see in the video the area of the sensor

    link for videohttps://youtu.be/6oQkWkqSpq0


  • Don Mathews
    Don Mathews Oct 17, 2015

    That might explain why sometimes it dont wsnt to start! Thanks a ton brother

  • Jason Smith
    Jason Smith Oct 17, 2015

    yes it would explain that, glad to help brother! if you have any more questions leave me a comment and I will be glad to assist you to the best of my ability, but pretty sure that will fix the problem, the crank sensor a lil hard to get to but really simple to replace just two bolts and one electrical plug. have a good one!

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5 Related Answers

Molson02536

Harvey N Tawatao

  • 3854 Answers

SOURCE: 2004 chevy aveo that the

P0128 - the thermostat may be stuck open or has anyone put a colder thermostat in the car,because once it starts to get cold it will throw a SES with a colder then stock thermostat. Replace the Thermostat should fix this problem.

PO700 is a code telling you there are codes in the TCM of some late model cars where the Transmission control module has been removed from the PCM the vehicles main computer , and basically it happens when the TCM has a issue within itself or the transmission that sets a code and it sends a request for the PCM to illuminate the SES or CHECK engine light. To get at the TCM codes requires in most cases the most up to date scanner software purchased after the cars model year and as of yet is still a little iffy. Standard OBD11 scanners will generally not be able to see these codes.

P1781 is set during engine start up when the ECM & TCM do not communicate properly during initial power up. It will only illuminate the service light if the condition occurs in 2 consecutive start cycles, but the DTC will be stored in the failure records after the first cycle.

Replace the Thermostat and go to a transmission shop that can read the DTC codes with a scanner and reset the ECM for clear the codes. Most Transmission shop will do that free of charge, if not turn the Ignition key's to the on position and and pull the ECM fuse out for 30 seconds and then place it back in. Turn the ignition keys to the off position for 10 seconds and then start the car, the engine may stall but let it. Just start the engine again, the ECM is just relearning the engine and go for a test drive. This will clear all the DTC history in the ECM like the day it cam off the assembly line. Good luck and keep me posted, be glad to answer ay more question.



Posted on Oct 30, 2009

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Anonymous

  • 1 Answer

SOURCE: I have a 2001 Volvo XC70. It has a trouble code

I have a 2001 Volvo XC70 The rear wiper in the inttermitant mode does not operate properly I have replaced the relay M16 in the rear cargo compartment, but the problem still persisits. Is there another relay somewehere else?

Posted on Jan 20, 2010

Freddy

  • 1311 Answers

SOURCE: PO 455 and PO 128 codes. What is wrong with my

P0455 is indicating a leak in the Evaporative Emissions system, a common reason for this is a loose gas cap.
P0128 is indicating that the engine is not coming up to operating temperature, a common reason for this is a stuck open thermostat.

Posted on Oct 23, 2010

johnjnail

john nail

  • 1702 Answers

SOURCE: I am getting codes PO 128, PO 300 and PO 506 on my

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 )

Posted on Apr 15, 2011

perkins48

Thomas Perkins

  • 14846 Answers

SOURCE: engine codes PO 128, PO 440, PO 456 and PO 622

Trouble Code: P0128

Thermostat Rationality Test

Possible Causes:


Check the operation of the thermostat (it may be stuck open).ECT Sensor is contaminated, damaged or it has failed.Inspect for low coolant level or for an incorrect coolant mixture.Trouble Code: P0440

EVAP Purge System Fault

Possible Causes:


EVAP purge valve vacuum supply is leaking or clogged.EVAP purge valve is stuck closed.EVAP purge solenoid has failed.NVLD assembly (leak detection) is damaged or has failed.NVLD switch circuit is open or the NVLD switch has failed.Ground circuit is open.PCM has failed.Trouble Code: P0456

EVAP Small Leak (0.020") Detected

Possible Causes:


.EVAP fuel tank or canister vapor hoses leaking or damaged.EVAP system component leaking, fuel cap loose or missing.Leak detection pump damaged or leaking.Trouble Code: P0622

Generator Field Control Circuit Malfunction

Possible Causes:


Generator field control circuit is open or is shorted to ground.Generator field control circuit is shorted to system power (B+).Generator field ground circuit is open.Generator is damaged or PCM has failed.PCM has failed.Here are the codes and causes.

Posted on Nov 25, 2012

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I punched in code po336 for a bing search,
and it says that it could be
PO336
Crankshaft Position Sensor Signal Range / Performance
But it may be for another car.

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