PCM/ECM/TCM Internal Temperature Sensor Circuit High
The P06AE code indicates that the powertrain control module (PCM), engine control module (ECM), or transmission control module (TCM) has detected a voltage signal from its internal temperature sensor that is higher than the expected range. This sensor monitors the internal temperature of the module to prevent overheating. A high circuit condition typically means the sensor is reading an abnormally high temperature or there is a short to voltage in the sensor circuit. This can lead to incorrect temperature readings, potentially causing the module to reduce performance or enter a protective mode.
01. Most Common Causes
- Faulty internal temperature sensor within the PCM/ECM/TCM
- Short to voltage in the sensor circuit
- Corrosion or damaged wiring/connectors
- Failed PCM/ECM/TCM module
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Transmission shifting issues
- Engine stalling or rough idle
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Inspect the PCM/ECM/TCM connectors for corrosion, damage, or loose pins.
Step 3: Check the sensor circuit for shorts to voltage or ground using a multimeter.
Step 4: If wiring is okay, suspect a faulty internal sensor or module; perform manufacturer-specific tests.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the module may overheat or enter limp mode, causing reduced performance and potential safety issues.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. If the module needs replacement, it can be $500-$1500 including labor.