What does code P1667 mean?

Q: What does code P1667 mean?

CI Circuit Malfunction. P1667 on Ford vehicles indicates a malfunction in the Continuous Injection (CI) circuit, which is part of the diesel engine management system. The powertrain control module (PCM) has detected an abnormal voltage or current condition in the CI circuit, preventing proper control of the injection system.

DTC codes / Ford codes / P1667

P1667 · FordCI Circuit Malfunction

P1667 on Ford vehicles indicates a malfunction in the Continuous Injection (CI) circuit, which is part of the diesel engine management system. The powertrain control module (PCM) has detected an abnormal voltage or current condition in the CI circuit, preventing proper control of the injection system.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

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