What does code P2681 mean?

Q: What does code P2681 mean?

Engine Coolant Bypass Valve A Control Circuit / Open. P2681 indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance on the control circuit for the engine coolant bypass valve 'A'. This valve directs coolant flow to help the engine reach operating temperature quickly and to manage cabin heater performance, so the PCM monitors the circuit for expected voltage or current and flags an error when the signal is missing or out of range.

DTC codes / P26xx · Computer and output circuits / P2681

P2681Engine Coolant Bypass Valve A Control Circuit / Open

P2681 indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance on the control circuit for the engine coolant bypass valve 'A'. This valve directs coolant flow to help the engine reach operating temperature quickly and to manage cabin heater performance, so the PCM monitors the circuit for expected voltage or current and flags an error when the signal is missing or out of range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.