OBD-II Code P0746 is a diagnostic trouble code that indicates a performance issue or a stuck-off condition with the pressure control solenoid “A” within the vehicle’s transmission system.
What Does the P0746 Code Mean?
The P0746 code is triggered when the Transmission Control Module (TCM) detects that the pressure control solenoid “A” is not functioning as expected. This solenoid is crucial for regulating the hydraulic pressure necessary for engaging various clutch packs in the transmission, which are responsible for providing the different gear ratios needed for efficient vehicle operation.
What Causes the P0746 Code?
- Transmission Control Module (TCM) failure
- Low transmission fluid level
- Failure of the pressure control solenoid
- Wiring issues or electrical faults
What Are the Symptoms of the P0746 Code?
- Increased fuel consumption
- Transmission may not shift properly
How Serious Is the P0746 Code?
The P0746 code is classified as urgent. It indicates a significant malfunction that could lead to severe damage to the vehicle’s transmission system or pose safety risks to the driver and passengers. Immediate attention is recommended to prevent further complications.
How to Diagnose the P0746 Code
To accurately diagnose the P0746 code, a mechanic should follow these steps:
- Connect an OBD-II scanner to retrieve the trouble code and any related codes.
- Check the transmission fluid level and condition.
- Inspect the wiring and connectors related to the pressure control solenoid.
- Perform tests on the pressure control solenoid and the TCM to verify their functionality.
Common Repairs for the P0746 Code
- Replacing the pressure control solenoid
- Repairing or replacing damaged wiring or connectors
- Refilling or changing the transmission fluid
- Replacing the Transmission Control Module (if necessary)
How Much Does It Cost to Fix the P0746 Code?
The cost to repair the P0746 code can vary widely depending on the underlying cause. Typical costs include:
- Pressure control solenoid replacement: $200 – $600
- Transmission fluid change: $100 – $300
- Wiring repairs: $50 – $150
- TCM replacement: $500 – $1,200
Can I Fix the P0746 Code Myself?
While some DIY enthusiasts may be able to address issues related to low transmission fluid or inspect wiring, fixing a P0746 code often requires specialized knowledge and tools, particularly when it involves the TCM or solenoid replacement. If you’re not experienced with automotive repairs, it is advisable to seek professional assistance.
