What does code P23D5 mean?

Q: What does code P23D5 mean?

Cylinder 2 Fuel Heater Control Circuit Open. P23D5 indicates that the powertrain control module (PCM) has detected an open circuit in the fuel heater control circuit for cylinder 2. The PCM commands the fuel heater on or off and monitors the circuit for expected voltage or current; when the feedback does not match the command, it sets this code. This heater improves fuel vaporization for cold starts and reduces emissions, but the engine may still run normally with the fault present.

DTC codes / P23xx · Ignition system and misfire / P23D5

P23D5Cylinder 2 Fuel Heater Control Circuit Open

P23D5 indicates that the powertrain control module (PCM) has detected an open circuit in the fuel heater control circuit for cylinder 2. The PCM commands the fuel heater on or off and monitors the circuit for expected voltage or current; when the feedback does not match the command, it sets this code. This heater improves fuel vaporization for cold starts and reduces emissions, but the engine may still run normally with the fault present.

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.