What does code P1377 mean?

Q: What does code P1377 mean?

Cylinder 8 Ignition Circuit Short To B+. P1377 on Volkswagen vehicles means the engine control module (ECM) has detected a short to battery positive voltage on the ignition coil circuit for cylinder 8. The ECM commands the coil to fire but sees voltage on the control wire that is higher than expected, indicating the wire is touching a power source or the coil has an internal short.

DTC codes / Volkswagen codes / P1377

P1377 · VolkswagenCylinder 8 Ignition Circuit Short To B+

P1377 on Volkswagen vehicles means the engine control module (ECM) has detected a short to battery positive voltage on the ignition coil circuit for cylinder 8. The ECM commands the coil to fire but sees voltage on the control wire that is higher than expected, indicating the wire is touching a power source or the coil has an internal short.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

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