Upshift/Skip Shift Solenoid Control Circuit Low
The P080C code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit of the upshift/skip shift solenoid. This solenoid is part of the transmission control system, typically used in manual transmissions to prevent certain gear shifts under specific conditions (e.g., low speed, light throttle) to improve fuel economy. A low circuit voltage suggests a short to ground, open circuit, or faulty solenoid, which can prevent the solenoid from operating correctly, potentially causing drivability issues.
01. Most Common Causes
- Faulty upshift/skip shift solenoid
- Short to ground in the solenoid control circuit
- Open circuit in the solenoid control circuit
- Damaged wiring or connectors
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission may not shift properly or skip gears
- Reduced fuel economy
- Vehicle may enter limp mode
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the wiring and connectors related to the upshift/skip shift solenoid for damage, corrosion, or loose connections.
Step 3: Test the solenoid resistance with a multimeter; compare to manufacturer specifications.
Step 4: Check for voltage at the solenoid connector with the ignition on; should see battery voltage.
Step 5: If wiring and solenoid are okay, test the PCM output signal; replace PCM if faulty.
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 erratic shifting and potential transmission damage. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause. Solenoid replacement may cost $100-$200, while wiring repairs are usually less.