What does code P23D3 mean?

Q: What does code P23D3 mean?

Cylinder 1 Fuel Heater Control Circuit Low. P23D3 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the cylinder 1 fuel heater, which is used to warm the fuel for better cold-start performance and combustion stability. The PCM monitors the circuit and sets this code when the voltage on the control wire falls below the expected threshold, indicating a short to ground, an open circuit, or a faulty heater element.

DTC codes / P23xx · Ignition system and misfire / P23D3

P23D3Cylinder 1 Fuel Heater Control Circuit Low

P23D3 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the cylinder 1 fuel heater, which is used to warm the fuel for better cold-start performance and combustion stability. The PCM monitors the circuit and sets this code when the voltage on the control wire falls below the expected threshold, indicating a short to ground, an open circuit, or a faulty 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.