Transmission Fluid Cooler Control Circuit High
The P2755 code indicates that the powertrain control module (PCM) has detected a high voltage condition in the transmission fluid cooler control circuit. This circuit controls the operation of the transmission fluid cooler pump or solenoid, which helps regulate transmission fluid temperature. A high voltage reading suggests a short to power, a faulty component, or a wiring issue. This can lead to improper cooling, potentially causing transmission overheating and damage.
1. Most Common Causes
- Short to power in the transmission fluid cooler control circuit wiring
- Faulty transmission fluid cooler pump or solenoid
- Corroded or damaged connector in the circuit
- Failed PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission overheating or erratic shifting
- Reduced fuel economy
- Transmission slipping or harsh engagement
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the transmission fluid cooler control circuit voltage with a multimeter to confirm high voltage.
Step 4: Check the resistance of the cooler pump/solenoid and compare to manufacturer specs.
Step 5: If wiring and component are good, test the PCM output signal or consider PCM replacement.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the transmission may overheat, leading to costly damage. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on the cause. Wiring repairs are cheaper, while replacing the pump or PCM can be more expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.