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Engine-Codes – Ford – B2870 Ford

B2870 Ford Code - Right Rear Tire Pressure Sensor Fault

Quick Answer

The B2870 Ford code indicates a fault with the right rear tire pressure sensor in the vehicle's tire pressure monitoring system (TPMS). Common causes include Physical damage to the right rear tire pressure sensor, Corrosion or rust affecting the sensor's functionality, Electrical issues in the sensor circuit. 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 Ford indicates Right Rear Tire Pressure Sensor Fault.
Common causes
Common causes include Physical damage to the right rear tire pressure sensor, Corrosion or rust affecting the sensor's functionality, Electrical issues in the sensor circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B2870 Ford Description

The B2870 Ford code indicates a fault with the right rear tire pressure sensor in the vehicle's tire pressure monitoring system (TPMS). The TPMS is designed to monitor the air pressure in each tire and alert the driver if there is a significant drop in pressure, which can help prevent accidents and improve fuel efficiency. When the right rear tire pressure sensor is not functioning correctly, it can lead to inaccurate tire pressure readings or a complete failure to transmit data to the vehicle's computer system.

OBDII Code B2870 Ford - Right Rear Tire Pressure Sensor Fault
B2870 Ford Code - Right Rear Tire Pressure Sensor Fault

Common Causes of B2870 Ford

  1. Physical damage to the right rear tire pressure sensor
  2. Corrosion or rust affecting the sensor's functionality
  3. Electrical issues in the sensor circuit
  4. Low battery voltage in the sensor
  5. Communication errors between the sensor and the vehicle's computer system

Symptoms of B2870 Ford

  1. TPMS warning light illuminated on the dashboard
  2. Inaccurate tire pressure readings displayed on the instrument cluster
  3. Fluctuating tire pressure readings while driving
  4. Loss of communication with the right rear tire pressure sensor
  5. Increased tire wear on the right rear tire

How to Fix B2870 Ford

  1. Begin by visually inspecting the right rear tire pressure sensor for any physical damage or corrosion.
  2. Check the sensor's battery voltage using a multimeter to ensure it is within the specified range.
  3. Test the sensor's communication with the vehicle's computer system using a TPMS diagnostic tool.
  4. If the sensor is faulty, replace it with a new sensor compatible with the vehicle's TPMS system.
  5. Reset the TPMS system and recalibrate the new sensor to ensure accurate tire pressure readings.

Cost to Fix B2870 Ford

The cost of repairing a right rear tire pressure sensor fault can vary depending on the make and model of the vehicle, the brand of the sensor, and labor rates at the auto repair shop. On average, the parts for a new tire pressure sensor can range from $50 to $200, while the labor costs can be between $50 and $150 per hour. Therefore, the total repair cost for this issue can range from $150 to $500 or more. It is recommended to consult with a certified mechanic or auto repair shop to get an accurate estimate based on your specific vehicle and location.

What does this mean?

Tech Notes for B2870 Ford

When the tire pressure warning light comes on solid and message center displays LOW TIRE PRESSURE, check the air pressure of all tires and adjust to the specified cold pressure listed on vehicle certification label (found on drivers door or door pillar). Drive the vehicle at 20 mph (32 km/h) for at least 2 minutes. If the vehicle has been stationary for more than 30 minutes, a TPM sensor Activation procedure may be needed. When the tire pressure warning light flashes for 70 seconds and then remains illuminated, after bulb-check has been performed and message center displays warning messages, there is a malfunction in the TPM system.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2870 Ford Code

1. What are the common symptoms of OBDII code B2870 Ford (Right Rear Tire Pressure Sensor Fault)?

The common symptoms include the TPMS warning light illuminating on the dashboard and a message indicating a fault with the right rear tire pressure sensor.

2. What are the possible causes of OBDII code B2870 Ford?

Possible causes include a malfunctioning right rear tire pressure sensor, faulty wiring or connections related to the sensor, low tire pressure, or sensor battery issues.

3. How can I diagnose the Right Rear Tire Pressure Sensor Fault (B2870) in a Ford vehicle?

You can diagnose the issue by using a TPMS diagnostic tool to read the specific error code, checking the right rear tire for proper inflation, and inspecting the sensor and its connections for any visible damage.

4. Is it safe to continue driving with the B2870 OBDII code triggered?

While it is generally safe to drive with the code triggered, it is important to address the issue promptly to ensure accurate tire pressure monitoring and safe driving conditions.

5. Can I reset the B2870 code in a Ford vehicle without fixing the underlying issue?

Resetting the code without addressing the root cause, such as a faulty sensor or wiring problem, may result in the code reappearing and the TPMS system not functioning properly.

6. How can I repair the Right Rear Tire Pressure Sensor Fault (B2870) in my Ford vehicle?

Repair options include replacing the right rear tire pressure sensor, repairing or replacing damaged wiring or connections, ensuring proper tire inflation, and resetting the TPMS system.

7. Are there any DIY tips for troubleshooting the B2870 code in a Ford vehicle?

DIY tips include checking the tire pressure in the right rear tire, inspecting the sensor and its connections for damage, and using a TPMS diagnostic tool to reset the system after any repairs.

8. Can extreme weather conditions affect the triggering of the B2870 code?

Extreme cold or hot weather conditions can potentially impact tire pressure readings and trigger the B2870 code, so it's important to monitor tire pressure regularly, especially in such conditions.

9. How much does it typically cost to repair the Right Rear Tire Pressure Sensor Fault (B2870) at a dealership or mechanic?

The cost of repair can vary depending on the specific issue, but it may involve parts and labor costs for sensor replacement, wiring repairs, or system diagnostics.

10. Is the B2870 Ford OBDII code specific to certain Ford vehicle models?

The B2870 code may be specific to certain Ford models that are equipped with a TPMS system and right rear tire pressure sensor, so it's essential to consult the vehicle's manual or a professional for accurate information.

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