A high voltage situation in the control circuit of the E shift solenoid likely indicates an electrical problem somewhere between that solenoid and the ECU. In this scenario, the vehicle’s computer records a DTC P0986.
How severe is the code?
If there’s an electrical issue with the E shift solenoid (the fifth solenoid in the valve body), a diagnostic code P0986 means you will eventually experience serious driving problems with your vehicle.
Symptoms
Symptoms of a P0986 include:
- Harsh gear shifts
- The transmission cannot shift into gear
Causes
- Low or dirty transmission fluid
- Damaged connectors/wiring
- Faulty shift solenoid
How to diagnose the code?
Diagnosing an OBDII fault code P0986 should begin by checking the transmission fluid level and condition. If the ATF is clean and at the correct level, then the wiring and connectors along the transmission wiring harness must be carefully inspected for signs of damaged wiring and corroded/broken connectors. If no issues have been detected so far, the E shift solenoid itself will need to be tested.
What repairs will fix P0986?
- Service the transmission
- Replace or repair damaged wiring/connectors
- Replace the shift solenoid