OBD-II Body Error Code B0570: How to Fix It

Q: What does OBD-II code B0570 mean?

Code B0570 indicates the antitheft horn output circuit has a short to battery, meaning the circuit is receiving unwanted power from the battery that could drain it or cause horn malfunctions.

Q: Can I drive with error code B0570?

Yes, you can typically drive with this code as it's low severity, but the antitheft system may not function properly and it could potentially drain your battery over time.

Q: How much does it cost to fix B0570?

Repair costs vary from $50-200 for DIY repairs (wire, connectors, relay) up to $200-500 at a shop depending on the extent of wiring damage and labor rates.

Q: Will B0570 cause my car to fail inspection?

In most areas, B0570 will not cause an emissions test failure since it's a body control code, but check your local inspection requirements as some areas include body codes.

Q: Can a bad horn relay cause code B0570?

Yes, a faulty horn relay with internal shorts can cause this code by creating an unintended path for battery voltage to reach the horn circuit.

Abstract

OBD-II error code B0570 indicates a short circuit in the antitheft horn output circuit where the circuit is receiving power from the battery when it shouldn't. This typically means there's unwanted electrical contact between the horn circuit and the battery's positive voltage, which can drain your battery or cause the horn to malfunction.