Fault code P 1253

1. Fault code applicable vehicle model: Jaguar fault code: P 1253 Chinese meaning: cruise control vacuum switch valve-stuck in open position English meaning: cruise control vacuum solenoid valve-stuck in open position Category: power system (from the manufacturer's own meaning) Detailed meaning: cruise control system controls the throttle angle by controlling the vacuum in the server, thus controlling the vehicle speed. When acceleration is needed, open the vacuum solenoid valve and communicate with the intake manifold (or special vacuum pump), so that the vacuum degree in the sealing sleeve is increased, the diaphragm is sucked, the spring force is overcome, the pull wire is pulled, the throttle opening is increased, and the vehicle is accelerated. When the set speed is reached, the vacuum solenoid valve and the ventilation solenoid valve are simultaneously closed. At this time, the vacuum degree in the sealing sleeve remains unchanged, and the car keeps driving at a constant speed. When deceleration is needed, the ventilation solenoid valve is opened to let air enter the sealing sleeve, and the diaphragm spring presses the diaphragm back to its original position, so that the throttle opening is reduced and the automobile decelerates. 2. Fault code applicable vehicle type: Audi common fault code: P 1253 Chinese meaning: fuel consumption signal short circuit to ground English meaning: fuel supply signal short circuit to ground category: powertrain system (meaning from the manufacturer) Detailed meaning: cruise control system controls the throttle angle by controlling the vacuum in the server, thus controlling the vehicle speed. When acceleration is needed, open the vacuum solenoid valve and communicate with the intake manifold (or special vacuum pump), so that the vacuum degree in the sealing sleeve is increased, the diaphragm is sucked, the spring force is overcome, the pull wire is pulled, the throttle opening is increased, and the vehicle is accelerated. When the set speed is reached, the vacuum solenoid valve and the ventilation solenoid valve are simultaneously closed. At this time, the vacuum degree in the sealing sleeve remains unchanged, and the car keeps driving at a constant speed. When deceleration is needed, the ventilation solenoid valve is opened to let air enter the sealing sleeve, and the diaphragm spring presses the diaphragm back to its original position, so that the throttle opening is reduced and the automobile decelerates. 3. Applicable models of fault codes: GM, Buick, Chevrolet, Cadillac, Hummer and Jinbei. Fault code: P 1253 Chinese meaning: fuel pump-diagnostic signal short circuit to ground English meaning: fuel pump-diagnostic signal short circuit to ground Category: powertrain system (meaning from the manufacturer) Detailed meaning: The function of fuel pump is to suck fuel out of the fuel tank and deliver it after pressurization. 4. Fault code applicable vehicle type: Saab (except 9-2X) Fault code: P 1253 Chinese meaning: throttle position motor-full-open signal at engine start English meaning: throttle position motor-full-open signal at engine start category: power system (meaning from manufacturer) Detailed meaning: In electronic throttle control (ETC) system, the throttle actuator is a stepping motor. 5. Fault code applicable models: Honda, Acura Fault code: P 1253 Chinese meaning: VTEC (variable timing electronic control) system fault English meaning: VTECSystemMalfunction category: powertrain system (from the manufacturer's own meaning) Detailed meaning: VTEC refers to the abbreviation of variable valve timing and valve lift electronic control system. In VTEC dual camshaft engine, the camshaft controlling the intake valve has two groups of cams with different angles. The camshaft does not directly control the valve, but pushes the valve through multi-stage rocker arms. At low speed, the rocker arm corresponding to the cam with larger idling angle pushes the valve with the cam with smaller angle. When the rotational speed reaches the set critical point, the bolt moves to fix the whole rocker arm, so that the cam with larger angle pushes the whole rocker arm, while the cam with smaller angle will idle because it can't contact the rocker arm, thus achieving the purpose of two-level control of valve timing and lift. This fault code indicates that the electronic control module has detected abnormal voltage of the VTEC (Variable Timing Electronic Control) solenoid valve circuit. The reason indicates that the control circuit of VTEC solenoid valve is faulty, the VTEC solenoid valve is faulty, and the electronic control module (PCM or ECM) is faulty.