What does code P2B76 mean?

Q: What does code P2B76 mean?

Coolant Heater B Control Circuit/Open. P2B76 indicates that the powertrain control module (PCM) has detected an open circuit or control fault on the ground-side control wire for coolant heater B, which is typically a positive temperature coefficient (PTC) heater used to warm engine coolant or the cabin. The PCM commands the heater on by grounding the control circuit, and when the feedback voltage does not match the expected state, it sets this code.

DTC codes / P2Bxx · Hybrid propulsion / P2B76

P2B76Coolant Heater B Control Circuit/Open

P2B76 indicates that the powertrain control module (PCM) has detected an open circuit or control fault on the ground-side control wire for coolant heater B, which is typically a positive temperature coefficient (PTC) heater used to warm engine coolant or the cabin. The PCM commands the heater on by grounding the control circuit, and when the feedback voltage does not match the expected state, it sets this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

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