B2870 Code - Right Rear Tire Pressure Sensor Fault
Quick Answer
The Tire Pressure Monitor (TPM) system monitors the air pressure in the 4 road tires with wheel-mounted tire pressure sensors. Common causes include Low tire pressure, Tire pressure sensor is missing or damaged, Spare tire is installed as a road wheel. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B2870 indicates Right Rear Tire Pressure Sensor Fault.
- Common causes
- Common causes include Low tire pressure, Tire pressure sensor is missing or damaged, Spare tire is installed as a road wheel.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B2870 Description
Each tire pressure sensor transmission is compared against a low-pressure limit (pressure listed on vehicle certification label minus 25 percent, which will be about 6-9 psi). If it is determined that the tire pressure has fallen below this limit, the SJB sends a message to the instrument cluster, which then illuminates the low pressure warning indicator and displays the appropriate message(s) in the message center (if equipped).
What are the Possible Causes of the DTC B2870?
- Low tire pressure
- Tire pressure sensor is missing or damaged
- Spare tire is installed as a road wheel
- Incorrect tire pressure sensor is installed
- Tire pressure sensor installed incorrectly
- Faulty Right Rear Tire Pressure Sensor
How to Fix the DTC B2870?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2870 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B2870 code?
Need more information on how to fix the B2870 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B2870 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B2870 Ford — Right Rear Tire Pressure Sensor Fault
- B2870 Lincoln — Right Rear Tire Pressure Sensor Fault
Frequently Asked Questions about B2870 Code
1. What are the common symptoms of OBDII code B2870 (Right Rear Tire Pressure Sensor Fault)?
- The most common symptom is a warning light on the dashboard indicating an issue with the right rear tire pressure sensor.
2. What are the possible causes of OBDII code B2870?
- The code B2870 can be triggered by a faulty right rear tire pressure sensor, low tire pressure in the right rear tire, sensor communication issues, or wiring problems.
3. How can I diagnose the cause of OBDII code B2870?
- To diagnose the cause of code B2870, you can use an OBDII scanner to read the code, check the tire pressure in the right rear tire, inspect the sensor and its wiring for any visible damage, and perform a sensor relearn procedure.
4. Can I drive my vehicle with OBDII code B2870?
- It is generally safe to drive the vehicle with code B2870, but it is recommended to address the issue as soon as possible to ensure proper tire pressure monitoring functionality.
5. How can I repair OBDII code B2870?
- Repair options for code B2870 include replacing the right rear tire pressure sensor, correcting the tire pressure in the affected tire, checking and repairing any wiring issues, and performing a sensor relearn procedure.
6. Will resetting the OBDII code B2870 turn off the warning light?
- Resetting the code may temporarily turn off the warning light, but if the underlying issue is not fixed, the light is likely to come back on once the system detects the fault again.
7. How much does it typically cost to repair OBDII code B2870?
- The cost of repairing code B2870 can vary depending on the cause of the issue, but it generally involves the cost of a new tire pressure sensor, any necessary wiring repairs, and labor charges for the repair work.
8. Can a DIY enthusiast fix OBDII code B2870 at home?
- Depending on the cause of the issue, DIY enthusiasts with the necessary tools and knowledge may be able to address code B2870 by replacing the tire pressure sensor, checking and repairing wiring, and performing a sensor relearn procedure.
9. Is it necessary to visit a dealership for OBDII code B2870 repair?
- While visiting a dealership is an option, independent auto repair shops and DIY enthusiasts can also address code B2870 effectively by following proper diagnostic and repair procedures.
10. How often does OBDII code B2870 occur in vehicles?
- OBDII code B2870 related to a right rear tire pressure sensor fault can occur in vehicles equipped with tire pressure monitoring systems, particularly in situations where the sensor or related components have issues.
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