What is the P0653 fault code What is the description of the Sensor Reference Voltage “B” Circuit High fault? How can you fix P0653 fault code What are the causes and symptoms of the P0653 error code?
What is the P0653 Fault code? What does it signify?
What does a P0653 code mean? “Sensor Reference Voltage Circuit “B Circuit High” . The sensor in question is typically associated with an automated transmission, gearbox, or differential. Circuit “B” It is also commonly referred as “Circuit 2” . Usually, the P0653 fault is accompanied with other fault codes that relate to the problem sensor. The error could be in the programming of the PCM if only the P0653 code has been set.
The powertrain control module (PCM), which is connected to the ignition, sends a 5-volt reference signal through a circuit that goes to various engine sensors. These sensors include A/C (air conditioning), MAP sensor and camshaft positioning sensor. The resistance of the sensors can be affected by speed, temperature, pressure and other conditions. The sensors transmit a return signal from the PCM. The signals from sensors are used by the PCM to optimize engine performance. If the voltage signal from a sensor is higher than what is programmed into the PCM’s PCM, then the fault code P0653 will be set.
NOTE: Manufacturers may have different reference voltage signal circuits that serve the sensors. Refer to your vehicle’s manual for more information about which reference voltage signal circuit serves which sensors.
The P0653 fault code can affect vehicles of all makes and models, including but not limited to: Volkswagen, Hyundai, Dodge Mitsubishi, Seat Kia, Ford. Chevrolet. Fiat.
What is the P0653 Fault Code and Why Does It Happen?
Below are some reasons to set fault code P0653:
- – Connectors and cables that have been damaged, burnedt, shorted, or disconnected.
- – Blown fuse
- – Power relay for defective system
- – One or more faulty sensors (fuel pressure sensor, A/C pressure sensor, MAP sensor, camshaft and crankshaft position sensor) connected to the “B” reference voltage circuit
- – PCM or other control module problems
What are the symptoms for the P0653 fault code?
This code may cause symptoms other than a flashing warning lamp and a set fault codes. The severity of symptoms depends on which sensors are affected.
These symptoms may be present in vehicles with code P0653.
- – Illumination at the check engine lights
- – The engine could not start or may run very hard
- Engine misfires may occur
- – Lower engine performance
- Fluctuations in idle speeds
- – Increased fuel use
- Air conditioner not working
- Transmission shift problems
- – Unable to switch between economy mode and sport mode by the transmission
- – No gear change or delay in transmission gear shiftings
- – Transmission cannot switch between four-wheel or two-wheel drive modes
- – Defective gearbox
- – Inconsistent, not working speedometer / Odometer
- – PCM may enter fail-safe mode to limit engine speed
- Other fault codes may also be possible
How do I fix the P0653 fault code?
Before you diagnose and repair fault code P0653 it is important to first diagnose and repair other sensor codes.
The following repairs may be able to resolve the P0653 fault code:
- Using the vehicle’s repair manual, you can determine the location and the function of the sensor. Next, check for fuses. Replace any blown fuse.
- – Inspect the system connectors and cables for damage. Replace if necessary.
- Using a multimeter, test the reference voltage and ground signals for the sensor. You should also check the continuity, resistance, and circuitry between the sensor, the PCM, and the sensor. Replace or repair short or open circuits
- – In circuit “B”, check the PCM and all parts.
How serious is the P0653 fault code?
The vehicle may not start if it encounters fault code P0653. It may cause the engine to run inconsistantly, erratically, or waste fuel. The vehicle might have trouble accelerating or not having enough power to satisfy the driver’s requirements. To prevent further damage, it is important to fix the problem as soon as possible.
