B2071 Toyota Code - Stop Light Control Relay Malfunction
Quick Answer
The B2071 diagnostic trouble code (DTC) for Toyota vehicles refers to a malfunction in the stop light control relay. Common causes include Malfunctioning stop light control relay, Wiring issues, Faulty brake light switch. 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
- B2071 Toyota indicates Stop Light Control Relay Malfunction.
- Common causes
- Common causes include Malfunctioning stop light control relay, Wiring issues, Faulty brake light switch.
- 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.
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Code B2071 Toyota Description
The B2071 diagnostic trouble code (DTC) for Toyota vehicles refers to a malfunction in the stop light control relay. This code indicates that there is an issue with the relay responsible for controlling the stop lights on the vehicle. The stop light control relay is an essential component of the vehicle's lighting system, as it plays a crucial role in activating the stop lights when the brake pedal is pressed.
Common Causes of B2071 Toyota
- Malfunctioning stop light control relay
- Wiring issues
- Faulty brake light switch
- Blown fuse
- Problem with the body control module
Symptoms of B2071 Toyota
- Stop lights not working
- Brake lights staying on continuously
- Transmission shift interlock issues
- Battery drain
- Dashboard warning light illuminated
How to Fix B2071 Toyota
- Begin by conducting a visual inspection of the stop light control relay, wiring, and connections to identify any visible signs of damage or corrosion.
- Test the stop light control relay using a multimeter to determine if it is functioning properly.
- Check the brake light switch and fuse to ensure they are in good working condition.
- If necessary, replace the faulty stop light control relay, repair any damaged wiring, or replace the brake light switch.
- Clear the DTC and test the vehicle to ensure that the issue has been resolved.
Cost to Fix B2071 Toyota
The typical repair costs for resolving a stop light control relay malfunction can vary depending on the specific cause of the issue and the labor rates in your area. In general, the cost of replacing a faulty stop light control relay can range from $50 to $150, while addressing wiring issues or replacing the brake light switch may increase the total cost. Additionally, labor costs at auto repair shops can range from $80 to $150 per hour, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B2071 Toyota Code
What does OBDII code B2071 mean for a Toyota vehicle?
OBDII code B2071 indicates a malfunction in the stop light control relay, which is responsible for operating the brake lights.
What are the common symptoms associated with the B2071 code?
Common symptoms include non-functioning brake lights, dashboard warning lights, and potential issues with the cruise control system.
What could cause the B2071 code to trigger?
Possible causes include a faulty stop light control relay, wiring issues, blown fuses, or problems with the brake light switch.
How can I diagnose the B2071 code?
To diagnose the B2071 code, check the stop light relay and associated wiring for damage, test the brake light switch, and inspect fuses for continuity.
What should I do if my brake lights are not working and the B2071 code is present?
Start by checking the brake light relay and switch, replace any blown fuses, and ensure the wiring is intact. If issues persist, consider consulting a professional mechanic.
Can I drive my vehicle with the B2071 code?
While you can drive the vehicle, it is not safe to do so if the brake lights are not functioning, as this can create a hazard on the road.
Is it necessary to reset the OBDII code after repairs?
Yes, after repairing the issue related to the B2071 code, it is recommended to clear the code using an OBDII scanner to reset the system.
How much does it typically cost to fix a B2071 code issue?
Repair costs can vary widely but may range from $50 to $200 depending on whether it involves replacing the relay, switch, or other components.
Can I fix the B2071 code issue myself?
If you have basic automotive repair skills, you may be able to troubleshoot and replace the stop light relay or switch. However, if you're unsure, it's best to seek professional help.
What should I check if my brake lights are working intermittently and the B2071 code is present?
Intermittent brake light issues may indicate a failing relay or a poor connection in the wiring. Inspect the relay, connectors, and the brake light switch for any signs of wear or damage.
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