Powertrain
generic / SAE
P23D0
Fuel Heater Control Module Feedback Signal Circuit High
Same as P23CD with the feedback voltage above 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 / D0
Possible causes
- Feedback line shorted to supply high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–450 €
- Estimated time: 0.6–2 h
- Component: fuel heater control module
- MIL / check engine light
Sources
References
sae:J2012