OBD-II Code P0973 is defined as a Shift Solenoid “A” Control Circuit Low. This code indicates that the Transmission Control Module (TCM) has detected a low voltage signal from the shift solenoid, which is critical for controlling hydraulic pressure in the transmission.
What Does the P0973 Code Mean?
The P0973 code signifies that the TCM has identified an issue with the shift solenoid “A” control circuit. The TCM relies on this solenoid to regulate hydraulic pressure necessary for engaging the clutch packs that facilitate gear shifts in the vehicle’s transmission. When it senses a malfunction, it triggers this trouble code.
What Causes the P0973 Code?
Several factors can lead to the P0973 code being triggered, including:
- Transmission Control Module (TCM) failure
- Low transmission fluid level
- Failure of the transmission shift solenoid
- Wiring issues related to the shift solenoid circuit
What Are the Symptoms of the P0973 Code?
When the P0973 code is present, you may observe the following symptoms:
- Increased fuel consumption
- Transmission may not shift properly
How Serious Is the P0973 Code?
The P0973 code is classified as urgent, meaning that immediate action is necessary. Ignoring this code can result in severe damage to the vehicle’s transmission system, potentially leading to costly repairs and safety issues for the driver and passengers.
How to Diagnose the P0973 Code
To accurately diagnose the P0973 code, a mechanic should follow these steps:
- Use an OBD-II scanner to confirm the P0973 code and check for any other related trouble codes.
- Inspect the transmission fluid level and condition. Low or contaminated fluid can affect solenoid performance.
- Examine the wiring and connectors associated with the shift solenoid for signs of damage or corrosion.
- Test the shift solenoid itself to ensure it operates correctly.
- Check the TCM for any faults or failures.
Common Repairs for the P0973 Code
Repairing the P0973 code may involve one or more of the following solutions:
- Replacing the transmission shift solenoid
- Repairing or replacing damaged wiring or connectors
- Refilling or replacing contaminated transmission fluid
- Replacing the Transmission Control Module (TCM) if it is found to be faulty
How Much Does It Cost to Fix the P0973 Code?
The cost to fix a P0973 code can vary widely based on the specific issue and the vehicle make and model. Generally, you can expect to pay between $100 and $400 for repairs. Replacing a shift solenoid may cost around $150-$250, while TCM replacements can be significantly more, ranging from $500 to $1,200.
Can I Fix the P0973 Code Myself?
If you have experience with automotive repairs and a good understanding of transmission systems, you may be able to address the P0973 code yourself. However, due to the complexity of transmission components and the potential for further damage, it is often advisable to consult a professional mechanic to ensure proper diagnosis and repair.
