P0688 - ECM/PCM Power Relay Sense Circuit/Open
P0688 is a generic powertrain diagnostic trouble code indicating ECM/PCM Power Relay Sense Circuit/Open. It relates to the Computer Output Circuit (PCM/ECU) system.
DTC Breakdown (SAE J2012)
| System | Powertrain (P) |
| Type | Generic |
| Subsystem | Computer Output Circuit (PCM/ECU) |
| Fault Index | 88 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code P0688 mean?
The dtc/">diagnostic trouble code P0688 represents ECM/PCM Power Relay Sense Circuit/Open. This standard generic code points to a monitored fault condition in the vehicle's Powertrain network.
Detailed diagnostic guides and specific fix procedures for code P0688 are currently being compiled. Always verify check engine warnings with a qualified mechanic.
Frequently Asked Questions about P0688
What does P0688 mean?
The diagnostic trouble code P0688 represents ECM/PCM Power Relay Sense Circuit/Open. This standard generic code points to a monitored fault condition in the vehicle's Powertrain network.
What is the system for P0688?
The P0688 code is located in the vehicle's Powertrain network.