P0948 Fault Code

Hydraulic Pump Relay Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0948 fault code indicates an issue with the hydraulic pump relay circuit, specifically that its voltage is higher than expected. This can lead to insufficient hydraulic pressure in the transmission system, affecting the overall performance and shifting of the vehicle. It's crucial to address this issue promptly to avoid further complications.

What are the symptoms of the P0948 code?

When experiencing a P0948 fault code, drivers may notice:

• Difficulty in gear shifting or slipping gears
• Warning lights or messages displayed on the dashboard
• Unusual noises coming from the transmission area
• Decreased acceleration and overall vehicle performance

What causes the P0948 code?

Common causes of the P0948 code include:

• Faulty hydraulic pump relay
• Short circuit in the wiring harness
• Poor electrical connection or corroded connectors
• Issues within the hydraulic pump itself
• Malfunctioning transmission control module (TCM)

How to fix P0948?

To resolve the P0948 fault code, the following steps are recommended:

• Inspect and test the hydraulic pump relay for proper operation, replacing it if faulty.
• Check all wiring and connections for damage or corrosion, repairing as necessary.
• Diagnose the hydraulic pump to ensure it is functioning correctly and replace it if required.
• If all else appears fine, the transmission control module may need to be examined for faults.