The P0946 trouble code indicates a range or performance issue detected in the hydraulic pump relay circuit. The hydraulic pump relay is responsible for controlling the operation of the hydraulic pump, which maintains hydraulic pressure within the transmission system. A range or performance issue in this system can lead to improper transmission operation and performance.
P0946 Hydraulic Pump Relay Circuit Range/Performance
Code symptoms P0946.
1. Transmission slipping.
2. Erratic shifting.
3. Harsh or delayed shifting.
4. Transmission overheating.
5. Check Engine Light illuminated.
Causes of the code P0946.
1. Faulty hydraulic pump relay.
2. Wiring or connector issues in the hydraulic pump relay circuit.
3. Faulty hydraulic pump.
4. Low transmission fluid level.
5. Hydraulic system leaks.
Code Solutions P0946.
1. Inspect the hydraulic pump relay for any signs of damage or malfunction and replace if necessary.
2. Check the wiring and connectors in the hydraulic pump relay circuit for damage or corrosion. Repair or replace any damaged wiring or connectors.
3. Test the hydraulic pump to ensure it is functioning properly. Replace if necessary.
4. Check the transmission fluid level and top up if necessary.
5. Inspect the hydraulic system for leaks and repair as needed.