Is It Safe to Drive With a P0116 Code?
Common Symptoms of a P0116 Fault
EML on
Engine may run rich when warm
Cooling fan running incorrectly
Temperature gauge issues
Possible Causes of P0116
A P0116 code can be triggered by faults in several different vehicle systems. Identifying the specific root cause requires proper diagnostic equipment and live data analysis — not just reading the code itself.
ECT Sensor Degradation
Sensor has drifted out of calibration.
Thermostat Fault
A stuck-open thermostat keeping the engine cold and causing sensor plausibility issues.
Wiring Intermittent Fault
Intermittent connection causing variable readings.
Coolant Flow Issue
Inadequate coolant flow causing unexpected temperature variations.
Why we don't list the exact part: A P0116 code tells you what's happening but not why. Replacing parts based on the code alone without proper diagnosis is the most common way drivers waste money. A proper diagnosis identifies the exact cause first.
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P0116 and Your MOT
A stored P0116 fault code will cause your car to fail its MOT. The engine management light will be illuminated during the test, which is an automatic failure under current MOT testing standards. Even if the light clears temporarily, the code remains in the ECU memory and can be read by the tester's equipment.
Get the fault properly diagnosed and repaired first — then have the code cleared and confirm the light doesn't return before booking your test.