Auto Configuration Engine Coolant Temperature Input Not Present
What it means
P063F means that during its auto-configuration self-check the control module expected an engine coolant temperature (ECT) input and didn't find it. It usually points to a programming/configuration mismatch or a missing ECT sensor wiring connection rather than a simple bad sensor. Because the ECM relies on coolant temperature to manage the engine, this can cause poor driveability or a no-start until it's corrected.
Can I keep driving? Treat as serious — the module can't confirm its coolant-temperature input, so the engine may run poorly or, on some vehicles, not start until the configuration or wiring is corrected.
Common symptoms
What you'll notice
- Check-engine light on
- Poor cold-start behavior or driveability issues
- Temperature-management faults (cooling fans, warm-up enrichment)
- Often stored alongside other configuration or coolant-temp codes
Common causes
Most likely first
- Incorrect or incomplete ECM/PCM programming or auto-configurationLikely
- Missing or mis-wired engine coolant temperature (ECT) sensor inputCommon
- Open or short in the ECT signal circuitCommon
- Faulty ECM/PCMLess often
How to diagnose & fix
Work through it in order
- Confirm the ECM/PCM has the correct software and configuration for this exact vehicle.
- Check the ECT sensor and its wiring for opens, shorts, or a missing connection.
- Scan for related configuration or ECT sensor codes and address those first.
- Reprogram/re-configure the module; replace the ECM/PCM only if confirmed faulty.
- Clear the code and re-test to confirm the repair.
FAQ
Quick answers
Is it safe to drive with P063F?+
Can I just clear P063F?+
Related codes
Often seen with P063F
Read & clear P063F yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.