P060F: Internal Control Module Coolant Temperature Performance

What it means

The control module detected a performance problem related to engine coolant temperature. The code alone does not establish whether the cause is internal processing or an external signal issue.

At a glance

• Usually lights the check-engine light

How it works

The ECM uses engine coolant temperature information to manage functions such as fueling and engine protection. P060F sets when the module detects a performance problem in processing or evaluating coolant-temperature information; the cause may be the sensor signal, its circuit, module power, software, or the ECM itself.

Common causes

Most likely first.

1. Coolant-temperature sensor or signal circuit fault
2. Open, shorted, or high-resistance sensor wiring
3. Poor connector contact or sensor reference voltage
4. Low or unstable module power or ground
5. Control-module hardware or software fault

Symptoms

• Check engine light on
• Possible limp mode or no-start
• Multiple follow-up faults across modules
• Reset/relearn may be needed after repair

How to diagnose it

1. Save freeze-frame data and scan for coolant-temperature, sensor-circuit, and low-voltage faults before clearing anything.
2. After the engine has cooled, compare scan-tool coolant temperature with ambient temperature, then watch whether the reading rises smoothly as the engine warms.
3. Inspect the coolant-temperature sensor connector and harness for corrosion, coolant contamination, loose pins, or damaged wiring.
4. Test the sensor signal, reference, ground, and wiring for opens, shorts, or excess resistance using the manufacturer's procedures and specifications.
5. Check ECM battery supply and grounds under the conditions specified by the manufacturer, and check for applicable software updates before considering module replacement.

Common fixes

• Reconnect or clean a poor coolant-temperature sensor connector contact.
• Repair damaged or high-resistance wiring in the coolant-temperature signal circuit.
• Replace the coolant-temperature sensor if its readings fail the manufacturer's tests.
• Correct unstable ECM power or ground connections and apply a relevant software update if specified.
• Replace and program the ECM only if sensor circuits, power, grounds, and software check out.

Can I keep driving?

If the temperature gauge or scan data suggests overheating, stop safely and switch off the engine; continuing can cause severe engine damage. If temperature appears normal and the engine runs well, keep trips short until the fault is diagnosed because incorrect temperature data can affect engine operation.