What does code P26E4 mean?

Q: What does code P26E4 mean?

Starter Relay B Circuit. P26E4 indicates that the engine control module (ECM) has detected a fault in the control circuit for starter relay B, which is the secondary relay responsible for engaging the starter motor. The ECM monitors the circuit for expected voltage or current and sets this code when the signal is outside the manufacturer's specified range, preventing reliable starter operation.

DTC codes / P26xx · Computer and output circuits / P26E4

P26E4Starter Relay B Circuit

P26E4 indicates that the engine control module (ECM) has detected a fault in the control circuit for starter relay B, which is the secondary relay responsible for engaging the starter motor. The ECM monitors the circuit for expected voltage or current and sets this code when the signal is outside the manufacturer's specified range, preventing reliable starter operation.

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.