Error code

OBD2 P0887

OBD2P0887
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

TCM Power Relay Control Circuit High.

Severity

moderateCan drive but may experience transmission issues.

Summary

P0887 indicates an issue with the transmission control module (TCM) power relay control circuit having abnormally high voltage when it should not.

Symptoms

  • Stored trouble code and illuminated warning light
  • Transmission may remain in 'limp mode'
  • Poor acceleration on some applications
  • Vehicle may get stuck in one gear

Common Causes

  • Damaged, burnt, or shorted wiring
  • Defective TCM power control relay
  • Failed or failing Transmission Control Module (rare)

Diagnosis

  1. Record all fault codes and freeze frame data.
  2. Locate the shift solenoid control relay and check for voltage between terminals.
  3. Check if there is current between input terminal and ground.
  4. Perform resistance tests on the relay as per manual instructions.
  5. Repeat steps until the issue is resolved or seek professional help.

Fixes

  • Replace damaged wiring, burnt wiring, shorted wiring, or defective TCM power control relay.

FAQ

What should I do if the issue is intermittent?

Repeat all steps and tests until the fault is found. If unresolved, refer to a professional mechanic.

Can software issues cause P0887 on certain vehicles?

Yes, especially on some Jeep and Chrysler products built in 2015; reprogramming with updated software may resolve the issue.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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