What does code P0671 mean?

Q: What does code P0671 mean?

Cylinder 1 Glow Plug Circuit. P0671 indicates that the engine control module (ECM) has detected an open circuit, short to ground, or short to voltage on the glow plug circuit for cylinder 1. This code is specific to diesel engines that use glow plugs for cold-start assistance, and it means the electrical path to that glow plug is not functioning as expected.

DTC codes / P06xx · Computer and output circuits / P0671

P0671Cylinder 1 Glow Plug Circuit

P0671 indicates that the engine control module (ECM) has detected an open circuit, short to ground, or short to voltage on the glow plug circuit for cylinder 1. This code is specific to diesel engines that use glow plugs for cold-start assistance, and it means the electrical path to that glow plug is not functioning as expected.

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.