Error code
OBD2 P0965
OBD2P0965
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Pressure Control Solenoid 'B' Control Circuit Range/Performance.
Severity
moderateCan drive, but shifting issues and potential damage may occur.
Summary
P0965 indicates an issue with the electronic pressure control solenoid B (EPCS) or its circuit in the automatic transmission's control system.
Symptoms
- Delayed transmission engagement
- Erratic shifting
- Transmission may fail to shift
- Harsh shifting
- Loud whining noise from the torque converter/bell housing area
Common Causes
- Open or shorted wiring/connectors in EPCS circuit
- Defective electronic pressure control solenoid B
- Low or subpar transmission fluid
- Transmission pump failure
Diagnosis
- Inspect transmission control wiring/connectors for open/short circuits.
- Check fluid level and condition; refill if low or subpar.
- Test pump pressure using a gauge after refilling fluid.
- Use diagnostic scanner to retrieve codes and freeze frame data.
- Disconnect controllers before testing circuit resistance with DVOM.
Fixes
- Replace defective electronic pressure control solenoid B if necessary.
FAQ
What should I do if the transmission fluid is low?
Refill with recommended fluid and inspect for leaks. If a leak is found, repair it before refilling.
How can I test the EPCS circuit resistance?
Disconnect related controllers to avoid damage, then use a DVOM to measure resistance values against manufacturer specifications.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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