Error code

OBD2 P0886

OBD2P0886
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

TCM Power Relay Control Circuit Low.

Severity

moderateCan drive, but performance issues may occur.

Summary

P0886 indicates a low voltage issue in the power relay control circuit of the Transmission Control Module (TCM), which can affect transmission operation.

Symptoms

  • Driveability issues
  • Vehicle enters 'limp' mode
  • Will not upshift, stuck in low gear
  • Low vehicle speed
  • High RPMs
  • Transmission slipping in and out of gear

Common Causes

  • Defective TCM power relay
  • Corroded or chafed wires
  • Corroded connections
  • Low system voltage
  • Defective TCM

Diagnosis

  1. Check automatic transmission fluid level and condition.
  2. Inspect fuse box for blown fuses or relays.
  3. Test battery voltage with multimeter.
  4. Visually inspect TCM and wiring harness connections.
  5. Measure resistance in the power relay control circuit.

Fixes

  • Replace defective TCM power relay if identified as faulty.

FAQ

What does P0886 mean?

P0886 indicates a low voltage issue in the power relay control circuit of the Transmission Control Module (TCM).

How do I diagnose P0886?

Start by checking transmission fluid, fuses and relays, battery voltage, TCM connections, and resistance in the power relay control circuit.

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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