What does code P056B mean?

Q: What does code P056B mean?

Cruise Control Decrease Distance Signal. P056B indicates that the cruise control system has detected a fault in the decrease distance signal circuit, which is the input used to reduce the following distance in adaptive cruise control systems. The computer monitors the expected voltage or signal from the distance decrease switch or sensor and sets this code when the signal is out of range or inconsistent with other inputs.

DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P056B

P056BCruise Control Decrease Distance Signal

P056B indicates that the cruise control system has detected a fault in the decrease distance signal circuit, which is the input used to reduce the following distance in adaptive cruise control systems. The computer monitors the expected voltage or signal from the distance decrease switch or sensor and sets this code when the signal is out of range or inconsistent with other inputs.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.