P0703 Subaru Code - Torque Converter Brake Switch 'B' Circuit Malfunction
Quick Answer
The Brake Pedal Position (BPP) switch is sometimes referred to as the stop lamp switch. Common causes include Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch), Misadjusted Brake Pedal Position Switch, Brake Pedal Position Switch harness is open or shorted. 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
- P0703 Subaru indicates Torque Converter Brake Switch 'B' Circuit Malfunction.
- Common causes
- Common causes include Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch), Misadjusted Brake Pedal Position Switch, Brake Pedal Position Switch harness is open or shorted.
- 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 P0703 Subaru Description
What are the Possible Causes of the DTC P0703 Subaru?
- Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch)
- Misadjusted Brake Pedal Position Switch
- Brake Pedal Position Switch harness is open or shorted
- Brake Pedal Position Switch circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0703 Subaru?
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 P0703 Subaru 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.
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Frequently Asked Questions about P0703 Subaru Code
1. What are the common symptoms of OBDII code P0703 in a Subaru related to the torque converter brake switch circuit malfunction?
The common symptoms include issues with shifting gears, harsh shifting, transmission slipping, and the inability to shift out of Park.
2. What are some possible causes of the P0703 code in a Subaru?
Potential causes of the P0703 code in a Subaru include a faulty torque converter brake switch, damaged wiring or connectors in the circuit, a defective transmission range sensor, or a problem with the transmission control module.
3. How can I diagnose the Torque Converter Brake Switch 'B' Circuit Malfunction in my Subaru?
You can diagnose the issue by performing a visual inspection of the wiring and connectors, testing the torque converter brake switch, checking the transmission range sensor, and using a scan tool to retrieve the trouble codes and data from the transmission control module.
4. Can I continue driving my Subaru with the P0703 code present?
It is not recommended to continue driving your Subaru with the P0703 code present, as it can lead to further damage to the transmission and potentially unsafe driving conditions.
5. How can I repair the Torque Converter Brake Switch 'B' Circuit Malfunction in my Subaru?
The repair process may involve replacing the torque converter brake switch, repairing or replacing damaged wiring or connectors, troubleshooting the transmission range sensor, or reprogramming the transmission control module.
6. Is it safe to reset the OBDII code P0703 in my Subaru without performing any repairs?
Resetting the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely reoccur. It is essential to diagnose and repair the root cause of the code to ensure safe and reliable operation of your vehicle.
7. Will the P0703 code affect the performance of my Subaru's transmission?
Yes, the P0703 code can impact the performance of your Subaru's transmission by causing shifting issues, harsh gear changes, and potential transmission slippage, leading to decreased driving comfort and efficiency.
8. How much does it typically cost to repair the Torque Converter Brake Switch 'B' Circuit Malfunction in a Subaru?
The cost of repairing the P0703 code in a Subaru can vary depending on the specific cause of the issue, the parts needed for replacement, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.
9. Can a DIY enthusiast fix the P0703 code in a Subaru, or should I seek professional help?
While some DIY enthusiasts may be able to diagnose and repair the P0703 code in a Subaru, it is a complex issue related to the transmission system. If you are not experienced in working on transmissions, it is advisable to seek professional help to ensure the problem is properly addressed.
10. How can I prevent the Torque Converter Brake Switch 'B' Circuit Malfunction from occurring in my Subaru in the future?
Regular maintenance of your Subaru, including checking for damaged wiring, keeping the transmission system in good condition, and addressing any warning signs promptly, can help prevent the occurrence of the P0703 code in the future.
Discuss the causes and fixes for P0703 Subaru OBDII Code
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Having a 2003 Subaru legacy outback code P0703 and the brake lights work fine. It has left me scratching my head, anyone with same issue and any luck with answers?
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You should replace the brake light switch anyways. More than likely that is the problem, otherwise the problem is the wire from the switch to the Transmission Control Module (TCM).
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@ODBIITech
I just replaced the Brake Light Switch in my 1996 Subaru Legacy L wagon after I had received the P0703 code. However, this has not solved the issue. My brake lights and horn remain inoperable.
You mention it could be the wiring in a previous comment. How do I locate replacement wiring?
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