Hydraulic Oil Temperature Sensor Circuit Intermittent
The P0941 code indicates an intermittent fault in the hydraulic oil temperature sensor circuit, typically found in vehicles with automatic transmissions or hydraulic systems. The sensor monitors fluid temperature and sends a signal to the powertrain control module (PCM). An intermittent circuit issue can cause erratic readings, leading to improper transmission shifting or torque converter lockup. Common causes include damaged wiring, loose connectors, or a failing sensor.
01. Most Common Causes
- Faulty hydraulic oil temperature sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Intermittent short or open circuit due to vibration or moisture
- Low or contaminated hydraulic fluid affecting sensor readings
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Transmission shifting erratically or slipping
- Torque converter clutch not engaging properly
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data to capture conditions when the fault occurred.
Step 2: Visually inspect the hydraulic oil temperature sensor and its wiring harness for damage, corrosion, or loose connections.
Step 3: Use a multimeter to test sensor resistance and compare to manufacturer specifications; check for intermittent opens or shorts by wiggling the harness.
Step 4: Check hydraulic fluid level and condition; replace if contaminated or low.
Step 5: If sensor and wiring are okay, clear the code and test drive to see if it returns; if intermittent, consider replacing the sensor as a precaution.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause transmission shifting problems and potential damage. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the sensor location and vehicle make.