Pressure Control Solenoid "B" Control Circuit High
Diagnostic trouble code P0967 indicates that the powertrain control module (PCM) or transmission control module (TCM) has detected a high voltage condition in the control circuit for pressure control solenoid 'B'. This means the electrical signal returning from the solenoid circuit is higher than the manufacturer's specified range, pointing to a short to voltage or an internal solenoid failure.
This code is considered high severity because improper transmission line pressure can lead to harsh shifting, slipping, and severe internal transmission damage if driven extensively.
Common symptoms
- Illuminated Check Engine Light
- Harsh or erratic transmission shifting
- Transmission slipping between gears
- Transmission stuck in 'limp mode' (failsafe mode)
- Decreased fuel economy
Likely causes
- Defective pressure control solenoid 'B'
- Short to voltage in the solenoid 'B' wiring harness
- Corroded or damaged electrical connectors in the transmission circuit
- Dirty or contaminated transmission fluid causing solenoid malfunction
- Faulty Transmission Control Module (TCM) or Powertrain Control Module (PCM)
What to check before replacing parts
Check the transmission fluid level and condition.
Look for: Fluid that is extremely low, burnt, or heavily contaminated with metal shavings, which can cause solenoid failure or indicate internal transmission damage.
Visually inspect the wiring harness and connectors for pressure control solenoid 'B'.
Look for: Chafed wires, melted insulation, or corroded pins that could cause a short to voltage in the control circuit.
Measure the resistance of pressure control solenoid 'B' using a digital multimeter.
Look for: Resistance values that are outside the manufacturer's specified range, indicating an internally shorted or failed solenoid.
Check for voltage at the solenoid connector with the key on, engine off.
Look for: Voltage present on the control wire when the PCM/TCM is not commanding the solenoid on, confirming a short to voltage in the harness.
Perform a bidirectional test using an advanced scan tool to command solenoid 'B' on and off.
Look for: Failure of the solenoid to click or change state, or the scan tool indicating the circuit remains high despite the command, pointing to a wiring or module issue.
This page explains the generic P0967 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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