KlaroFault codeP0887
MODERATETCM Power Relay Control Circuit High
What this code means
TCM Power Relay Control Circuit High.
P0887 is a generic code: it means the same thing on every make. P0887 belongs to family P08xx — Transmission (continued). Its page explains how to read a code and groups all its codes by part.
Type of fault
The control unit reads a voltage on this circuit above its expected range. Usual causes: a broken wire or a poor ground, a short to a supply voltage, or the component itself. As with a low signal, check the wiring and connector before the part.
Gearbox control unit (TCM)
The gearbox control unit drives the solenoids and reads the gearbox sensors. It communicates with the engine control unit over the vehicle network and is fed by its own relay and fuse.
What you notice
The gearbox goes into limp mode, sometimes several warnings at once, shifts that do not happen.
How to check it
Check its fuses and relay, then the battery voltage and the grounds: a weak supply causes many of these faults. Then the connectors of the unit, which on some cars sits on the gearbox itself and suffers from heat and leaks.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back. Clearing a fault code yourself →
How to read this code
- PPowertrain
- 0standardised code
- 8Transmission (continued)
- 87P0887
Other codes for the same part
- P0880TCM Power Input Signal
- P0881TCM Power Input Signal Range/Performance
- P0882TCM Power Input Signal Low
- P0883TCM Power Input Signal High
- P0884TCM Power Input Signal Intermittent
- P0885TCM Power Relay Control Circuit /Open
- P0886TCM Power Relay Control Circuit Low
- P0888TCM Power Relay Sense Circuit
- P0889TCM Power Relay Sense Circuit Range/Performance
- P0890TCM Power Relay Sense Circuit Low
- P0891TCM Power Relay Sense Circuit High
- P0892TCM Power Relay Sense Circuit Intermittent
