Question about Cars & Trucks
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
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
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
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
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
Trouble Code: P0128 Thermostat Rationality Test Possible Causes: EVAP Purge System Fault Possible Causes: EVAP Small Leak (0.020") Detected Possible Causes: Generator Field Control Circuit Malfunction 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 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 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 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.
Thermostat Rationality Test
EVAP Purge System Fault
EVAP Small Leak (0.020") Detected
Generator Field Control Circuit Malfunction
Posted on Nov 25, 2012
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