C0191 low

Tire Pressure Monitoring System Right Rear Sensor Fault

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.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $50 - $200 (parts and labor)

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BlueDriver Bluetooth Pro Scanner

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LAUNCH CRP123X (Reads ABS + Chassis)

Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.

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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

Trigger right rear TPMS sensor with activation tool
Check sensor signal strength and battery level
Verify sensor ID matches module registration
Perform full TPMS relearn procedure
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.