What does code P23D1 mean?

Q: What does code P23D1 mean?

Cylinder 1 Fuel Heater Control Circuit Open. P23D1 indicates that the powertrain control module (PCM) has detected an open circuit in the fuel heater control circuit for cylinder 1. The PCM commands the heater on or off and monitors the circuit for expected voltage or current; when the feedback does not match the command, the code is stored.

DTC codes / P23xx · Ignition system and misfire / P23D1

P23D1Cylinder 1 Fuel Heater Control Circuit Open

P23D1 indicates that the powertrain control module (PCM) has detected an open circuit in the fuel heater control circuit for cylinder 1. The PCM commands the heater on or off and monitors the circuit for expected voltage or current; when the feedback does not match the command, the code is stored.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.