P CODE FAMILY

Powertrain code references — Page 31.

Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.

Generic OBD-II

P0C3F

These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.

DC/DC Converter Temperature Sensor B Low

DC/DC Converter Temperature Sensor B High

DC/DC Converter Temperature Sensor B Intermittent/Erratic

Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit

Battery inlet-temperature plausibility depends on thermal mode

Inlet-temperature circuit low can produce a hot converted reading

Inlet-temperature circuit high can display below −40°C

Battery coolant sensor A changes erratically

Battery coolant-pump control line versus pump performance

Hybrid/EV Battery Pack Coolant Pump A Control Circuit Low

Hybrid/EV Battery Pack Coolant Pump A Control Circuit High

Pump performance uses a thermal response sequence

Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit/Open

Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit Low

Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit High

Motor A learned offset exceeded the accepted angle

Motor B learning can fail by range or by a sudden change

Drive Motor A Position Sensor Circuit A

Drive Motor A Position Sensor Circuit A Range/Performance

motor A resolver circuit A low concerns the S13 reference

motor A resolver circuit A high has its own reference-voltage filter

Drive Motor A Position Sensor Circuit A Intermittent/Erratic

Drive Motor B Position Sensor Circuit A

Drive Motor B Position Sensor Circuit A Range/Performance

motor B resolver circuit A low evaluates the S13 reference

resolver circuit A high needs the motor B source-label caveat

Drive Motor B Position Sensor Circuit A Intermittent/Erratic

Drive Motor A Position Sensor Circuit B

Drive Motor A Position Sensor Circuit B Range/Performance

motor A resolver circuit B low monitors the S24 reference

motor A resolver circuit B high is an S24 reference-range fault

Drive Motor A Position Sensor Circuit B Intermittent/Erratic

Drive Motor B Position Sensor Circuit B

Drive Motor B Position Sensor Circuit B Range/Performance

Motor B resolver circuit B low uses a reference-voltage test

Motor B resolver circuit B high differs from its low branch

Drive Motor B Position Sensor Circuit B Intermittent/Erratic

Generator Position Sensor Circuit A

Generator Position Sensor Circuit A Range/Performance

Generator Position Sensor Circuit A Low

Generator Position Sensor Circuit A High

Generator Position Sensor Circuit A Intermittent/Erratic

Generator Position Sensor Circuit B

Generator Position Sensor Circuit B Range/Performance

Generator Position Sensor Circuit B Low

Generator Position Sensor Circuit B High

Generator Position Sensor Circuit B Intermittent/Erratic

Hybrid/EV Battery Temperature Sensor A/B Correlation

Hybrid/EV Battery Temperature Sensor B/C Correlation

Hybrid/EV Battery Temperature Sensor C/D Correlation

Hybrid/EV Battery Temperature Sensor D/E Correlation

Hybrid/EV Battery Temperature Sensor E/F Correlation

Niro coolant-pump performance and the contamination decision

Motor Electronics Coolant Pump B Control Performance

Hybrid/EV Battery System Discharge Time Too Short

Discharge timing is not a safe-isolation timer

A precharge rise can be too fast for the expected sequence

Slow precharge has voltage and sustained-current branches

Drive Motor A Inverter Voltage Too High

Drive Motor B Inverter Voltage Too High

Generator Inverter Voltage Too High

Hybrid/EV Battery Temperature Sensor G Circuit

Sensor G performance is a relative temperature test

Sensor G low circuit can yield a high temperature display

Sensor G high circuit can report an extreme cold value

Sensor G temperature data is erratic

Hybrid/EV Battery Temperature Sensor H Circuit

Sensor H must agree with other module-group temperatures

Sensor H circuit low must be separated from temperature direction

Sensor H high circuit can produce a cold limit reading

Battery temperature sensor H varies too abruptly

Hybrid/EV Battery Temperature Sensor F/G Correlation

Hybrid/EV Battery Temperature Sensor G/H Correlation

Hybrid/EV Battery Temperature Sensor I Circuit

Sensor I performance compares module-group temperatures

Sensor I low circuit and a hot converted report

Sensor I high circuit is the cold end of the conversion

Battery temperature sensor I is intermittently unstable

Hybrid/EV Battery Temperature Sensor J Circuit

Sensor J temperature disagrees with the battery's other sensors