Tire Pressure Monitoring System Right Rear Sensor Fault
What does C0191 mean?
The C0191 code means the vehicle's onboard diagnostic system has detected: Tire Pressure Monitoring System Right Rear Sensor Fault. This is a low severity code.
Common Symptoms
- TPMS warning light on
- Right rear tire pressure not displaying
- System fault for TPMS on instrument panel
- Right rear tire status unknown
- TPMS relearn unsuccessful for right rear
Probable Causes (Ranked by Likelihood)
- Dead right rear TPMS sensor battery Very High
- Right rear sensor damaged during service High
- Sensor misregistered to wrong wheel position Moderate
- Interference from aftermarket equipment Low
Step-by-Step Diagnostic Procedure
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Trigger right rear TPMS sensor with activation tool
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Check sensor signal strength and battery level
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Verify sensor ID matches module registration
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Perform full TPMS relearn procedure
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Check for sources of RF interference near receiver
Frequently Asked Questions
Do TPMS sensors have a warranty?
TPMS sensors are typically covered under the new vehicle warranty for 3 years or 36,000 miles. Replacement sensors from shops may have their own warranty, usually 1-2 years.
Can cold weather trigger TPMS faults?
Cold weather reduces tire pressure, which can trigger a low pressure warning. It should not cause a sensor fault. However, extreme cold can sometimes affect sensor battery performance temporarily.
Is the spare tire monitored by TPMS?
Some vehicles have a TPMS sensor in the spare tire. If the spare has a dead sensor or is not registered, it can trigger a TPMS fault on certain vehicle systems.