Error code

OBD2 P0885

OBD2P0885
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

TCM Power Relay Control Circuit/Open.

Severity

moderateCan drive, but shifting issues and potential stalling may occur.

Summary

Code P0885 indicates an open condition in the power relay control circuit for the transmission control module (TCM), which is typically part of the PCM housing.

Symptoms

  • Delayed transmission engagement
  • Harsh or erratic shifting
  • Engine may stall at idle
  • Shift interlock function may be disabled
  • Intermittent or total speedometer/odometer failure

Common Causes

  • Defective TCM power relay
  • Blown or corroded fuse
  • Burnt fusible link
  • Shorted or open TCM power relay circuit
  • Bad TCM/PCM or programming error

Diagnosis

  1. Inspect all system wiring and connectors for damage.
  2. Check fuses and fusible links for proper operation.
  3. Test TCM relay with a digital volt/ohmmeter (DVOM).
  4. Swap relays temporarily to diagnose faulty components.
  5. Use a diagnostic scanner to retrieve codes and freeze frame data.

Fixes

  • Replace defective TCM power relay or blown fuse/fusible link.

FAQ

What should I do if the P0885 code persists after replacing fuses and relays?

If the issue continues, suspect a defective PCM or programming error.

Can I drive with this code?

You can drive but may experience shifting issues and potential stalling. It's recommended to address it soon.

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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