Engine Oil Temperature Sensor Range/Performance
The P0196 code indicates that the Engine Oil Temperature (EOT) sensor is reporting a voltage or resistance value outside the expected range, or its response time is too slow. This sensor monitors oil temperature to help the PCM adjust fuel delivery and ignition timing. A faulty sensor, wiring issues, or low oil level can trigger this code.
01. Most Common Causes
- Faulty engine oil temperature sensor
- Wiring or connector issues (open, short, corrosion)
- Low or dirty engine oil
- PCM software or hardware problem (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor fuel economy
- Engine performance issues (hesitation, rough idle)
- Possible overheating or inaccurate temperature gauge
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the EOT sensor connector and wiring for damage or corrosion.
Step 3: Check engine oil level and condition; top off or change if necessary.
Step 4: Test the EOT sensor resistance and compare to manufacturer specs.
Step 5: If sensor and wiring are okay, test the PCM output signal.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as inaccurate oil temperature readings can lead to engine damage. Have it diagnosed promptly.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on sensor location and labor rates.