Pressure Control Solenoid Control Circuit Low
The P0970 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit of the pressure control solenoid. This solenoid regulates hydraulic pressure within the automatic transmission to control shift timing and firmness. A low circuit condition can result from wiring issues, a faulty solenoid, or a PCM problem, potentially leading to improper transmission operation.
01. Most Common Causes
- Faulty pressure control solenoid
- Open or shorted wiring in the solenoid circuit
- Poor electrical connection at the solenoid or PCM
- Failed PCM
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping or stuck in gear
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional transmission codes.
Step 2: Inspect the wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the pressure control solenoid resistance and compare to manufacturer specs.
Step 4: Check the solenoid control circuit voltage with a multimeter while the engine is running.
Step 5: If all else is okay, consider PCM replacement or reprogramming.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause transmission damage or unsafe driving conditions due to erratic shifting.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on whether the solenoid, wiring, or PCM needs replacement.