Pressure Control Solenoid "B" Control Circuit High
P0967 indicates the transmission control module detected abnormally high voltage in the Solenoid B control circuit, preventing proper transmission fluid pressure regulation. This causes the transmission to enter limp mode and shift erratically, potentially leading to transmission damage if not addressed.
What You Might Notice
- Check Engine Light illuminated
- Transmission shifts hard or bangs into gear
- Transmission slips during acceleration
- Increased fuel consumption
- Transmission overheating
Most Common Causes
- 1
Solenoid B wiring short to power
The control wire for Solenoid B is shorted to battery voltage or a high voltage source, sending excessive voltage to the solenoid circuit and triggering the code.
- 2
Faulty Pressure Control Solenoid B
The solenoid itself is stuck open or has internal resistance failure, preventing proper current limiting and allowing excessive voltage to be present in the circuit.
- 3
Transmission control module failure
The TCM's output driver circuit for Solenoid B is damaged or malfunctioning, causing it to output excessive voltage to the solenoid.
- 4
Corroded or loose wiring connectors
Poor connections at the solenoid connector or along the wiring harness create resistance changes that cause intermittent high voltage conditions.
How to Diagnose It
- 1
Check Solenoid B wiring short to power — The control wire for Solenoid B is shorted to battery voltage or a high voltage source, sending excessive voltage to the solenoid circuit and triggering the code.
- 2
Check Faulty Pressure Control Solenoid B — The solenoid itself is stuck open or has internal resistance failure, preventing proper current limiting and allowing excessive voltage to be present in the circuit.
- 3
Check Transmission control module failure — The TCM's output driver circuit for Solenoid B is damaged or malfunctioning, causing it to output excessive voltage to the solenoid.
- 4
Check Corroded or loose wiring connectors — Poor connections at the solenoid connector or along the wiring harness create resistance changes that cause intermittent high voltage conditions.
How to Fix It
- 1
Inspect and repair solenoid B wiring
Locate the wiring harness to Solenoid B and check for damaged insulation, fraying, or pinched wires that could cause a short to power. Repair or replace the affected wiring and retest.
- 2
Replace Pressure Control Solenoid B
Remove the faulty solenoid from the transmission and install a new OEM or quality replacement, ensuring proper seating and connector attachment before refilling transmission fluid.
- 3
Check and clean connector terminals
Disconnect the solenoid connector and inspect terminals for corrosion or damage. Clean with electrical contact cleaner and apply dielectric grease to ensure proper connection.
- 4
Test and replace transmission control module
If wiring and solenoid are confirmed good, the TCM output driver may be damaged. Have the TCM tested at a specialist or replace with a remanufactured unit if necessary.
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