OBD-II code · Powertrain (generic, extended)
P23CD Fuel Heater Control Module Feedback Signal Open
The feedback line from the fuel heater control module to the ECM - reporting heater status - is open.
Is it safe to drive with P23CD?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in feedback wiring
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Heater Control Module
Related codes
- P23CAFuel Rail Heater Control Circuit Open
- P23CBFuel Rail Heater Control Circuit Low
- P23CCFuel Rail Heater Control Circuit High
- P23CEFuel Heater Control Module Feedback Signal Performance
- P23CFFuel Heater Control Module Feedback Signal Circuit Low
- P23D0Fuel Heater Control Module Feedback Signal Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.