B2871
Left Rear Tire Pressure Sensor Fault
B2871 is an OBD-II diagnostic trouble code meaning: Left Rear Tire Pressure Sensor Fault. Common causes: low sensor battery, mechanical damage to the sensor. Estimated repair cost: $56–167.
Symptoms
- The low tire pressure indicator is on
- Incorrect pressure readings in the left rear wheel
- TPMS may not display data for this wheel
Causes
- Low sensor battery
- Mechanical damage to the sensor
- Damage to the receiver antenna in the wheel
- Problems with the TPMS wiring harness
- Software error in TPMS module
How to Fix
- Checking tire pressure manually
- Checking the condition of the sensor (physical inspection)
- Diagnosing the sensor signal using a scanner
- Sensor retraining (if supported)
- Replace the sensor if necessary
Related codes
FAQ
What does the B2871 code mean?
B2871 is an OBD-II diagnostic trouble code that indicates: Left Rear Tire Pressure Sensor Fault
What causes a B2871 error code?
The most common causes of B2871 include: Low sensor battery; Mechanical damage to the sensor; Damage to the receiver antenna in the wheel; Problems with the TPMS wiring harness.
How do I fix a B2871 diagnostic trouble code?
To fix B2871: Checking tire pressure manually. Checking the condition of the sensor (physical inspection). Diagnosing the sensor signal using a scanner. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2871?
Limited driving only, diagnose soon
How much does it cost to fix B2871?
The estimated repair cost for B2871 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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