Transmission Fluid Temperature Sensor A Circuit Malfunction
The P0710 code indicates a malfunction in the transmission fluid temperature (TFT) sensor circuit. This sensor monitors the temperature of the transmission fluid and sends a signal to the powertrain control module (PCM). When the PCM detects an abnormal voltage or resistance from the sensor circuit, it sets this code. Common issues include a faulty sensor, wiring problems, or connector damage. This can lead to improper transmission shifting and potential overheating.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed shifting
- Transmission slipping or overheating
- Reduced fuel economy
2. Most Common Causes
- Faulty, worn, or drifted transmission fluid temperature (TFT) sensor
- Short to ground, short to reference voltage, or open circuit in the sensor wiring
- Corroded, bent, or moisture-contaminated terminals in the sensor or harness connectors
- Intermittent or high-resistance connection in the harness due to chafing, excessive heat, or poor installation
- Internal PCM/TCM failure (rare)
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the TFT sensor and its wiring for damage or corrosion.
Step 3: Test sensor resistance and compare to manufacturer specifications.
Step 4: Check transmission fluid level and condition.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause transmission overheating and damage. Seek repair promptly.
How much does it cost to fix?▼
Typically $50-$150 for sensor replacement, plus diagnostic fees. Costs may vary based on vehicle and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.