What does code P2689 mean?

Q: What does code P2689 mean?

Fuel Supply Heater Control Circuit High. P2689 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the fuel supply heater control circuit, which is used to warm the fuel in cold conditions for better vaporization and starting. The PCM expects a certain voltage range when the heater is commanded on or off, and a high reading means the circuit is likely open, shorted to voltage, or the heater element has failed.

DTC codes / P26xx · Computer and output circuits / P2689

P2689Fuel Supply Heater Control Circuit High

P2689 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the fuel supply heater control circuit, which is used to warm the fuel in cold conditions for better vaporization and starting. The PCM expects a certain voltage range when the heater is commanded on or off, and a high reading means the circuit is likely open, shorted to voltage, or the heater element has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaComputer and output circuits

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