The Lemon IndexA 5-volt reference feed to several sensors is faulty, which can trigger a group of other codes.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Shorted sensor on that circuit. Then: wiring fault.
Owners named P0651 in 7 complaints to the U.S. government, most often on the Chevrolet Impala.
Cars owners report it on
Complaints that name P0651, by model. Raw counts, not a failure rate: popular models get more complaints.
The details
What P0651 means
A 5-volt reference feed to several sensors is faulty, which can trigger a group of other codes.
Can I drive with P0651?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
57% of the owner complaints that name P0651 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0651
- Shorted sensor on that circuit
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 57% of complaints
- Loses power or goes into limp mode: 29% of complaints
- Brakes or ABS act up: 29% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
P0657 P0638 P0627 P0685 P061C P061B P061A P068A
Quick answers
What does P0651 mean?
Sensor Reference Voltage B Circuit/Open. A 5-volt reference feed to several sensors is faulty, which can trigger a group of other codes.
Can I drive with P0651?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P0651?
Shorted sensor on that circuit; Wiring fault.
Counts: NHTSA owner complaints whose text names P0651. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.