P0965 Fault Code

Pressure Control Solenoid B Control Circuit Range/Performance

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

The P0965 fault code indicates an issue with the Pressure Control Solenoid B's control circuit range or performance in the transmission system. This solenoid plays a critical role in regulating the fluid pressure within the transmission, affecting shifting and overall performance. Problems can arise when the solenoid is malfunctioning or when there is an issue with the circuit, which may include poor electrical connections or damaged wiring.

What are the symptoms of the P0965 code?

Symptoms associated with the P0965 code may include:

• Erratic or harsh shifting of the transmission
• Slipping gears or inability to shift at all
• Engine stalling or stuttering
• Warning lights illuminated on the dashboard, such as the Check Engine Light
• Reduced fuel efficiency due to improper shifting

What causes the P0965 code?

Common causes of the P0965 code include:

• Faulty Pressure Control Solenoid B
• Wiring issues such as shorts or open circuits
• Poor electrical connections related to the solenoid or its circuit
• Transmission fluid contamination
• Malfunctioning Transmission Control Module (TCM)
• Low transmission fluid levels or incorrect fluid type

How to fix P0965?

To resolve the P0965 code, the following steps may be taken:

1. Inspect the wiring and connectors related to the Pressure Control Solenoid B for damage or corrosion.
2. Test the solenoid itself for proper functionality and replace it if faulty.
3. Check the transmission fluid level and quality; replace or top off as necessary.
4. Use a scan tool to clear the fault code and test drive the vehicle to ensure the issue does not reappear.
5. If the problem persists, a thorough diagnosis of the transmission system and possible TCM issues may be necessary.