What does code P1640 mean?

Q: What does code P1640 mean?

Powertrain DTCs Available in Another Module. P1640 on Ford vehicles means the powertrain control module (PCM) has detected that one or more other modules on the vehicle's controller area network (CAN) have stored diagnostic trouble codes (DTCs) of their own. The PCM is not reporting a fault in its own circuitry; it is acting as a messenger, telling you that a companion module such as the transmission control module (TCM), anti-lock brake system (ABS) module, or body control module (BCM) has logged a fault that needs attention.

DTC codes / Ford codes / P1640

P1640 · FordPowertrain DTCs Available in Another Module

P1640 on Ford vehicles means the powertrain control module (PCM) has detected that one or more other modules on the vehicle's controller area network (CAN) have stored diagnostic trouble codes (DTCs) of their own. The PCM is not reporting a fault in its own circuitry; it is acting as a messenger, telling you that a companion module such as the transmission control module (TCM), anti-lock brake system (ABS) module, or body control module (BCM) has logged a fault that needs attention.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyProfessional

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.