OBD2 Error Code U0155: How to Fix It

Q: Can I drive with OBD2 code U0155?

You can typically drive short distances, but your speedometer, fuel gauge, and warning lights may not work properly. This creates safety risks, so get it diagnosed and repaired promptly.

Q: What causes U0155 communication loss?

Common causes include blown fuses, corroded wiring connections, damaged CAN bus wires, or a failed instrument cluster module. Water damage and rodent damage to wiring are also frequent culprits.

Q: How much does it cost to fix U0155?

Costs range from $50-200 for simple fuse or wiring repairs, up to $300-800 for instrument cluster replacement or extensive wiring repairs, depending on vehicle make and labor rates.

Q: Will U0155 cause my car to fail inspection?

Yes, in most areas this code will cause an emissions test failure since the OBD2 system cannot properly communicate with all required modules during the inspection process.

Q: Can a weak battery cause U0155?

A severely weak or failing battery can cause communication errors, but U0155 specifically points to instrument cluster communication issues rather than general power problems.

Abstract

OBD2 error code U0155 indicates your vehicle has lost communication with the instrument panel cluster (IPC), meaning the dashboard gauges and warning lights may not function properly. This communication breakdown typically occurs due to wiring issues, blown fuses, or a faulty instrument cluster module.