OBDII Code List > P0128 HONDA
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P0128 HONDA
P0128 HONDA - Coolant System Malfunction
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Possible causes
- Insufficient warm up time
- Low engine coolant level
- Leaking or stuck open thermostat
- Engine coolant temperature sensor harness is open or shorted
- Engine coolant temperature sensor circuit poor electrical connection
- Faulty engine coolant temperature sensor
- Low engine coolant level
- Leaking or stuck open thermostat
- Engine coolant temperature sensor harness is open or shorted
- Engine coolant temperature sensor circuit poor electrical connection
- Faulty engine coolant temperature sensor
Tech notes
If cooling system is not leaking and the fluid level is OK, replacing the thermostat usually takes care of the problem.
When is the code detected?
The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0128 HONDA Description
Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine.
HONDA Technical Service Bulletins for P0128 code
2006 HONDA ACCORD ELECTRICAL SYSTEM:WIRING Details
2007 HONDA ACCORD ELECTRICAL SYSTEM:WIRING Details
2006 HONDA CIVIC ELECTRICAL SYSTEM:WIRING Details
2007 HONDA CIVIC ELECTRICAL SYSTEM:WIRING Details
2000 HONDA ACCORD UNKNOWN OR OTHER Details
2003 HONDA CIVIC ELECTRICAL SYSTEM Details
2004 HONDA CIVIC ELECTRICAL SYSTEM Details
2003 HONDA PILOT ENGINE AND ENGINE COOLING:COOLING SYSTEM Details
2004 HONDA PILOT ENGINE AND ENGINE COOLING:COOLING SYSTEM Details
2001 HONDA ACCORD ENGINE AND ENGINE COOLING:COOLING SYSTEM Details
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