What P0117 means
Engine Coolant Temperature Sensor Circuit 1 Low Input
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0117:
| BMW | Engine Coolant Temperature Circuit Low |
| FORD | ECT Circuit Low Input |
| HONDA | Engine Coolant Temperature (ECT) Sensor Circuit Low Input |
| MITSUBISHI | Engine Coolant Temperature Circuit Low Input; Engine coolant TEMP.sensor low |
| NISSAN | Engine Coolant Temperature Circuit Low Input |
| VOLKSWAGEN | Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage |
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