P1564 BUICK, CADILLAC, CHEVROLET, GMC: CRUISE CONTROL SYSTEM VEHICLE ACCELERATION TOO HIGH
POST UPDATED IN June, 2023
P1564 BUICK, CADILLAC, CHEVROLET, GMC: CRUISE CONTROL SYSTEM VEHICLE ACCELERATION TOO HIGH
The cruise control is a feedback control system installed in many modern vehicles. The purpose of this system is to maintain a constant car speed despite external conditions, such as wind changes or similar. To achieve this, the vehicle’s speed is measured and compared to the desired or reference speed and the throttle is automatically adjusted.
The duct updates the vehicle manually through the use of a button, with which the cruise control is adjusted to the current speed. The system takes its speed signal from a rotating driveshaft, a speedometer cable, and a Wheel Speed Sensor. Most cruise control systems do not allow the use of the system below a speed of about 40 km/h. The vehicle maintains the desired speed with the use of a vacuum-powered servo mechanism or by electronics integrated into the car, in the case of using the DBW (Cable Driving System).
When the diagnostic code P1564 OBDII is set, it is because with the engine running and the cruise control enabled and activated, the PCM (Powertrain Control Module) detects a vehicle acceleration rate, which is considered extremely fast.
The DTC code P1564 OBD2 is stored for one or more of the following reasons:
To solve the fault code P1564 OBDI, consider the following steps: