B1971: Passenger Seatback Rearward Switch Circuit Short to Ground
MediumBodySeats
What does B1971 mean?
B1971 is a diagnostic trouble code indicating "Passenger Seatback Rearward Switch Circuit Short to Ground". The ECU is detecting a voltage reading that is below the expected range in the seats circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Intermittent warning lights
- Erratic gauge readings
Estimated repair cost
Typical range in Australia (parts + labour)
$100 – $500 AUD
Common causes
- Damaged or corroded wiring harness
- Loose or disconnected electrical connector
- Failed seats sensor or actuator
- Blown fuse in the related circuit
- Poor ground connection
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code B1971 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.