What does code P23D7 mean?

Q: What does code P23D7 mean?

Cylinder 2 Fuel Heater Control Circuit Low. P23D7 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the cylinder 2 fuel heater, which is used to warm the fuel for better cold-start performance and combustion efficiency. The PCM monitors the circuit and sets this code when the voltage on the control side falls below the expected threshold, typically indicating a short to ground or an open circuit in the wiring or heater element.

DTC codes / P23xx · Ignition system and misfire / P23D7

P23D7Cylinder 2 Fuel Heater Control Circuit Low

P23D7 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the cylinder 2 fuel heater, which is used to warm the fuel for better cold-start performance and combustion efficiency. The PCM monitors the circuit and sets this code when the voltage on the control side falls below the expected threshold, typically indicating a short to ground or an open circuit in the wiring or heater element.

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.