This code indicates the powertrain control module has detected an abnormal voltage or resistance reading from the cruise control multi-function input 'B' circuit, which typically corresponds to a specific button input such as Set/Coast or Resume/Accelerate. The fault may stem from a failed switch, wiring integrity issues, or connection problems within the steering column controls.
Internal contacts within the cruise control buttons wear out or suffer from moisture ingress, causing open circuits or erratic resistance readings on the specific input line.
The ribbon cable or sliding contact within the clockspring assembly fails, interrupting the signal path between steering-wheel-mounted switches and the column harness.
Chafing against the steering column, corrosion at pin terminals, or pinched wires create opens or shorts in the low-current signal circuit.
Non-original equipment steering wheels, adapter plates, or remote-start installations can disrupt the factory cruise control input circuits.
Rarely, an internal fault within the PCM misinterprets a valid input signal; this should only be considered after mechanical and wiring causes are eliminated.
Yes; this fault affects only the cruise control convenience feature and does not impact engine performance, braking, or safety systems, though you will lose speed-holding functionality.
Probably not. For this specific code, the root cause is almost always a faulty switch, clockspring, or wiring issue. PCM replacement is rarely the solution and should only be considered after exhaustive circuit testing proves the module is truly defective.
This strongly suggests a failed clockspring, which contains the internal ribbon circuits for all steering-wheel-mounted controls; when it breaks, it affects multiple systems simultaneously.
No. In most cases, only the specific switch assembly or clockspring requires replacement; the steering wheel itself is usually reusable hardware.