Powertrain
generic / SAE
P23CF
Fuel Heater Control Module Feedback Signal Circuit Low
Same as P23CD with the feedback voltage below the plausible range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / CF
Possible causes
- Feedback line shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: medium
- DIY: possible
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References
sae:J2012