Engine Oil Temperature Sensor Malfunction
The P0195 code indicates a malfunction in the Engine Oil Temperature (EOT) sensor circuit. The Powertrain Control Module (PCM) detects that the voltage signal from the EOT sensor is out of the expected range, often due to a faulty sensor, wiring issues, or a short circuit. This sensor monitors oil temperature to optimize engine performance and protect against overheating.
01. Most Common Causes
- Faulty engine oil temperature sensor
- Open or shorted wiring in the sensor circuit
- Poor electrical connection at the sensor connector
- Damaged PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine performance issues (rough idle, hesitation)
- Increased fuel consumption
- Possible engine overheating
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the EOT sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor resistance with a multimeter and compare to manufacturer specifications.
Step 4: Check the voltage signal at the PCM connector; if abnormal, repair wiring or replace sensor.
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 the engine may overheat or suffer performance issues. 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.