P060F: Internal Control Module Coolant Temperature Performance
The P060F code indicates that the Engine Control Module (ECM) has detected an internal performance issue with the coolant temperature sensor circuit or the sensor itself. This typically means the ECM is receiving an implausible or erratic coolant temperature signal, which can affect engine operation, fuel trims, and emissions. The problem may be due to a faulty sensor, wiring issues, or an internal ECM fault.
1. Most Common Causes
- Faulty or out-of-spec engine coolant temperature (ECT) sensor
- Open, short-to-ground, or short-to-voltage in the ECT circuit wiring or connectors
- Low coolant level or air pockets in the cooling system
- Thermostat stuck open (engine fails to reach normal operating temperature)
- Internal PCM failure (damaged internal temperature sensor or processing error)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance or rough idle
- Hard starting or stalling
- Increased fuel consumption
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to read the coolant temperature value and compare it to actual engine temperature using an infrared thermometer.
Step 2: Inspect the ECT sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Test the ECT sensor resistance at different temperatures and compare to manufacturer specifications.
Step 4: If sensor and wiring are okay, check for ECM software updates or consider ECM replacement.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the incorrect coolant temperature reading can cause poor engine performance, increased emissions, and potential engine damage if the cooling system is not functioning properly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and replacement of the ECT sensor, but can be higher if the ECM needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.