OBD-II Chassis Error Code C1155: How to Fix It

Q: What causes wheel speed sensor signals to become reversed?

Reversed wheel speed sensor signals typically occur during maintenance or repair work when wiring harnesses or connectors are accidentally swapped, or when replacement sensors are installed with incorrect wiring connections.

Q: Can I drive with error code C1155?

While the vehicle may still be drivable, C1155 can affect ABS and traction control functionality. It's recommended to address this issue promptly as it may compromise braking performance in emergency situations.

Q: Will C1155 cause my ABS light to come on?

Yes, error code C1155 will typically trigger the ABS warning light on your dashboard. You may also see the traction control light illuminated as these systems are interconnected.

Q: How much does it cost to fix C1155?

If the issue is simply crossed wiring or swapped connectors, repair costs can be minimal (under $100 for labor). However, if sensors need replacement or extensive wiring repair is required, costs can range from $200-600 depending on your vehicle.

Q: Can a bad wheel bearing cause C1155?

While a severely damaged wheel bearing can affect wheel speed sensor readings, C1155 specifically indicates reversed signals, which is almost always a wiring or connection issue rather than a mechanical bearing problem.

Abstract

OBD-II error code C1155 indicates that the wheel speed sensors for the rear right (RR) and front right (FR) wheels are sending reversed signals to your vehicle's ABS control module. This means the wiring harnesses or connectors for these sensors have been swapped or incorrectly connected, which can cause ABS and traction control system malfunctions.