What is the P0652 fault code What is the description of the Sensor Reference Voltage “B” Circuit Low malfunction? How do you fix the P0652 fault code What are the symptoms and causes for the P0652 fault code
What is the P0652 Fault code? What does it all mean?
A code P0652 is an acronym for “Sensor Reference Voltage Circuit “B” Circuit Low . The sensor is typically associated with an auto transmission, gearbox, or differential. Circuit “B” Also known as “Circuit 2” . Usually, the P0652 faultcode is accompanied with other fault codes that relate to the problem sensor. A programming error may occur if only the P0652 fault codes are 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. Some of these sensors include the A/C (air conditioner) pressure sensor, MAP Sensor, camshaft positioning sensor and crankshaft location sensor. The resistance of the sensors fluctuates with temperature, speed and pressure. They transmit a signal back to the PCM. The signals from sensors are used by the PCM to optimize engine performance. The fault code P0652 is activated if the voltage signal from the sensor falls below the values programmed into PCM.
NOTE: There may be differences in the reference voltage signal circuits used to power the sensors. You can find more details about which reference voltage circuit serves which sensor in your vehicle’s service manual.
The P0652 fault code can affect vehicles of all makes and models, including but not limited to Mitsubishi, Audi, Ford, Hyundai Jeep, Dodge, Volkswagen, Volkswagen, and Chevrolet.
What is the P0652 Fault Code and Why Does It Happen?
Below are some reasons to set fault code P0652:
- – Connectors and cables that have been damaged, burnedt, disconnected, and/or corroded.
- – Blown Fuses
- – 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
- – Issues with the PCM and other control modules
What are the symptoms of P0652 malfunction code?
This code may cause symptoms other than a flashing warning lamp and a set fault codes. The severity of symptoms depends on the sensor that is affected by the fault in the reference voltage circuit.
You may experience the following symptoms if your vehicle has the code P0652:
- – Illumination for check engine light
- – The engine could not start or may run very hard
- Engine misfires can occur
- – Lower engine performance
- – Fluctuations of idle speed
- – Increased fuel use
- – Air conditioning not working
- Transmission shift problems
- – Unable to switch between economy mode and sport mode by the transmission
- – Transmission gear shifting delays or no shifts at all
- – The transmission cannot switch between two-wheel and four-wheel drive modes.
- – Defective gearbox
- – Inconsistent, not working speedometer/odometer
- – The PCM can be set to fail-safe mode or limit engine speed.
- – You can also set other fault codes
How do I fix the P0652 fault code?
Before you diagnose and repair fault code P0652 it is important to first diagnose and repair any other sensor codes.
The following repairs may be able to resolve the P0652 fault code:
- To locate the sensor’s location and function, refer to the vehicle’s repair manual. Next, check for fuses. Replace blownfuses.
- – Inspect the system connectors and cables for damage. Replace if necessary.
- Use a multimeter to test the ground and reference voltages of the sensor. You should also check the continuity, resistance, and circuitry between the sensor/PCM. Repair or replace short or open circuits
- – In circuit “B”, check the PCM and all parts.
How Serious Is the P0652 Fault Code
A P0652 fault code could cause the vehicle not to start. It may cause the engine to run inconsistantly, erratically, or waste fuel. It might have trouble accelerating or not having enough power to satisfy the driver’s requirements. It is best to address the issue as soon as possible in order to stop the damage from getting worse.
