P0652 CHEVROLET code

A P0652 code means that a malfunction has been identified in the sensor reference voltage “B” circuit, and this has most likely been done by the powertrain control module or another of the control modules related to the system.

What does P0652 code mean?

OBD-II Code P0652 is defined as a Sensor Reference Voltage “B” Circuit Low. The engine control module (PCM) sends out a 5 volt reference signal to all applicable engine sensors. If the PCM detects an issue with this signal, it will set code P0652.

What does code po641 mean?

Sensor Reference Voltage ‘A’ Circuit Open

Code P0641 stands for Sensor Reference Voltage ‘A’ Circuit Open. The vehicle’s computer, the powertrain control module (PCM), supplies a reference voltage to many of the onboard sensors. Typically, this reference signal is 5-Volts.

What is sensor reference voltage a circuit open?

OBD Code P0641 – Sensor Reference Voltage “A” Circuit Open

The letter “A” isolates a particular area of the circuit more than a particular component or wire. This code is usually detected when PCM/ECM monitors the sensor 5 volt reference circuit voltage is higher or lower than expected.

What does sensor reference voltage a circuit open mean?

Diagnostic trouble code (DTC) P0641 stands for “Sensor Reference Voltage “A” Circuit/Open.” It is logged whenever the PCM detects voltage that does not match manufacturer specifications on the 5-volt reference circuit.


What is reference voltage in car?

A reference voltage is sent to the sensor from the on-board computer. The sensor’s resistance decreases as the engine increases. The temperature of the vehicle can be determined by the computer. When the engine is at operating temperature.

What is a 5 volt reference circuit?

In modern vehicle design, 5-volt reference signals/circuits are a key aspect of vehicle command and control. As summarized by Gary Goms, the 5-volt reference signal typically. “flows through a sensor containing a resistance that varies according to changes in temperature, pressure or position.