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P0652 is a diagnostic trouble code (DTC) for "Sensor Reference Voltage “B” Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
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.
A generic OBD-11 code, the P0652 means that the "B" area of a circuit (rather than a specific wire or component) has a fault, and that the PCM or another control module has detected it. The modules that might do this range widely and can include the alternative fuel control, ABS, body, instrument panel, turbo, fuel injection, anti-theft, traction, cruise control, proximity alert, or climate control modules, among others.
The P0652 code can be cause by:
In addition to the storing of the code, the P0652 code has a few common symptoms that include an engine that begins to run very roughly, difficulty starting the engine (or no starting at all), a distinct decrease in fuel economy, misfires in the engine, a check engine light, and low amounts of operating power in the vehicle.
A mechanic will diagnose the P0652 code using an OBD-II scanner along with some visual inspections. The first step is for the mechanic to examine the freeze frame data and determine just when the code first appeared. They must then reset the fault codes and do a road test to see if it triggers the code to reappear.
They will then do a visual examination of the connectors and wiring associated with the "B" circuit. They will look for any disconnected, shorted or corroded wiring and components, including fuses. If everything appears to be in good order, they can move on to the repair process. If not, they must do any and all repairs or replacements and then retest the vehicle to see if the code is still occurring. If so, they can then move on to repairs.
Because this particular code involves a wide range of potential issues, it is important to heavily assess the stored codes alongside any symptoms. Often, mechanics look at the codes as the cause of the problem, allowing them to make unneeded repairs.
The P0652 code can cause a vehicle to reach a no start condition. It can make the engine run very inconsistently and roughly, and it can gobble up fuel. The vehicle may struggle to accelerate or have power adequate to the driver's needs, and so it is a very serious matter.
Unfortunately, the most common repairs for the P0652 are time consuming and demand a lot of diagnosis and troubleshooting:
This code is referring to a five volt signal from or to multiple engine drivability sensors. The sensors speak directly to control modules that operate various systems in the vehicle. While it is possible for individual control modules to fail, it is rare. This issue is typically due to wiring problems.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.