P0197 Code: Engine Oil Temperature Sensor Circuit Low
🟢 Low severity · drivable
Yes, the engine will usually run normally, but the oil temperature reading may be wrong — get it checked soon.
What P0197 means
The engine oil temperature sensor is sending a voltage lower than the normal range. This often means a short to ground in the wiring or a failed sensor. The engine will usually run normally, but the oil temperature reading may be missing or wrong.
Symptoms
- Check engine light on
- Oil temperature gauge reading low or stuck
- Oil life monitor not working right
Common causes
- most common: Faulty engine oil temperature sensor
- common: Short to ground in the sensor wiring
- less common: Damaged or corroded connector
- rare: Engine computer (PCM) fault
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the engine oil temperature sensor | Yes | $30–100 |
| Inspect and repair the wiring or connector | Yes | $15–80 |
Frequently asked questions
Can I drive with a P0197 code?
Yes. The engine will usually run normally, but the oil temperature reading will be wrong until it's fixed.
What does a low circuit mean?
It means the sensor voltage is below the normal range, often from a short to ground or a failed sensor.
How much does it cost to fix a P0197?
A new sensor is usually $30–100, and wiring repairs are typically $15–80.
Related codes
P0195
P0195 Code: Engine Oil Temperature Sensor A Circuit Malfunction
P0196P0196 Code: Engine Oil Temperature Sensor Range/Performance
P0198P0198 Code: Engine Oil Temperature Sensor Circuit High
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.