Auxiliary Transmission Fluid Pump Control Module Circuit Low
The P0C24 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the control circuit of the auxiliary transmission fluid pump module. This pump is typically used in hybrid or start-stop vehicles to maintain transmission fluid pressure when the engine is off. A low circuit voltage can result from wiring issues, a faulty pump module, or a weak battery/charging system, potentially leading to inadequate transmission lubrication and overheating.
01. Most Common Causes
- Faulty auxiliary transmission fluid pump control module
- Open or shorted wiring in the pump control circuit
- Corroded or loose electrical connectors
- Low battery voltage or charging system issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission slipping or harsh shifting
- Reduced fuel economy
- Transmission overheating warning
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect wiring and connectors for damage, corrosion, or looseness.
Step 3: Test battery voltage and charging system output.
Step 4: Use a multimeter to check voltage and ground at the pump module connector.
Step 5: If circuit tests pass, replace the auxiliary transmission fluid pump control module.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a low circuit condition can cause insufficient transmission lubrication, leading to internal damage and costly repairs.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor, depending on the root cause and vehicle model.