P173B
CAN Engine Coolant Temperature Invalid
P173B is an OBD-II diagnostic trouble code meaning: CAN Engine Coolant Temperature Invalid. Common causes: coolant temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $6–28.
Symptoms
- Incorrect temperature readings on the dashboard
- Engine overheating
- Unstable cooling fan operation
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Coolant temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Problems with the CAN bus
- Engine control unit malfunction
- Corroded contacts or poor connection
How to Fix
- Check the temperature sensor readings using a diagnostic scanner
- Inspect the wiring and connectors of the temperature sensor
- Check the resistance of the temperature sensor at different temperatures
- Check the integrity of the CAN bus
- If necessary, replace the coolant temperature sensor
Related codes
FAQ
What does the P173B code mean?
P173B is an OBD-II diagnostic trouble code that indicates: CAN Engine Coolant Temperature Invalid
What causes a P173B error code?
The most common causes of P173B include: Coolant temperature sensor malfunction; Open or short circuit in the sensor circuit; Problems with the CAN bus; Engine control unit malfunction.
How do I fix a P173B diagnostic trouble code?
To fix P173B: Check the temperature sensor readings using a diagnostic scanner. Inspect the wiring and connectors of the temperature sensor. Check the resistance of the temperature sensor at different temperatures. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P173B?
Limited driving only, diagnose soon
How much does it cost to fix P173B?
The estimated repair cost for P173B is $6–28. Actual cost depends on your vehicle, location, and labor rates.
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