Transmission

P0890 — Clutch Solenoid Circuit Malfunction

Severity: medium Drive with care, to a shop

What P0890 means

The transmission control module (TCM) constantly monitors the electrical circuit of the solenoid that controls clutch engagement in an automated manual or dual-clutch transmission. P0890 sets when current or voltage in that circuit is out of range, such as an open, a short to ground or power, or a solenoid that does not respond. Without precise clutch control, the transmission cannot launch or shift smoothly.

Symptoms

  • Shudder or judder when pulling away
  • Vehicle will not move or engage a gear
  • Transmission in limp mode
  • Transmission warning or check engine light on
  • Harsh or erratic shifts
  • No-start due to interlock

Possible causes

  1. Failed clutch control solenoid
  2. Damaged wiring or connector to the mechatronic unit
  3. Low or degraded transmission fluid
  4. Short to ground or power in the circuit
  5. Faulty TCM power relay
  6. Failed TCM

How to diagnose

  1. Scan all codes and freeze-frame data, record them, clear and see if P0890 returns
  2. Check transmission fluid level and condition per the manufacturer's procedure
  3. Inspect the mechatronic wiring and connectors for chafing, corrosion and oil intrusion
  4. Check TCM fuses, relay, battery voltage and ground connections
  5. Measure solenoid resistance and compare with the service specification
  6. Test circuit wires for opens and shorts to ground or power
  7. Command the solenoid with a scan tool active test
  8. If the circuit is good, evaluate the TCM and check for software updates

Common fixes

  • Repair or replace damaged wiring and connectors
  • Replace the solenoid or the mechatronic unit
  • Change the transmission fluid and filter
  • Replace the TCM power relay or fuse
  • Replace or reprogram the TCM

Questions and answers

What does P0890 mean?

It is an electrical fault in the clutch solenoid circuit of an automated transmission. The TCM sees abnormal current or voltage and limits transmission operation.

Can I drive with P0890?

Only carefully and for a short distance to a shop. The transmission may suddenly stop engaging gears, and shuddering wears the clutch.

Will clearing the code fix it?

No. If the cause remains, the code will return. Check fluid, wiring and connectors first, then the solenoid itself.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.