P06A7

Sensor Reference Voltage B Circuit Range/Performance

Q: Is it safe to drive with P06A7?

Often short trips are okay, but because several sensors share this reference the engine may run poorly or drop into limp mode. Get it diagnosed soon.

Q: Can I just clear P06A7?

You can, but if a sensor or wire is shorting the reference it returns quickly, usually with other sensor codes; find the short instead.

Sensor reference voltage Generic OBD-II High

What it means

P06A7 means the ECM's regulated reference-voltage B circuit (commonly the 5-volt supply shared by several sensors) is reading outside its expected range. Because many sensors depend on that reference, a fault here often sets multiple sensor codes and can make the engine run poorly or enter limp mode until the shorted circuit or sensor is found.

High

Can I keep driving? Often driveable, but expect a check-engine light and possibly rough running or limp mode, since several sensors may lose a stable reference voltage.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Multiple sensor codes set at the same time
Rough running, hesitation, or reduced power
Reduced-power or limp mode in some cases

Common causes

Most likely first

Short to voltage or ground on the 5-volt reference B circuitLikely
A shorted or failing sensor pulling the shared reference off valueCommon
High-resistance, corroded, or loose connections on the reference circuitCommon
Faulty ECM/PCM (least likely)Less often

How to diagnose & fix

Work through it in order

Scan for companion sensor codes that share the reference B circuit.
Inspect the reference wiring and connectors for shorts, opens, and corrosion.
Disconnect sensors one at a time to find one that is dragging the reference voltage off value.
Back-probe the reference at the ECM and compare against the sensors.
If wiring and sensors are good, evaluate the ECM/PCM.

FAQ

Quick answers

Is it safe to drive with P06A7?+

Often short trips are okay, but because several sensors share this reference the engine may run poorly or drop into limp mode. Get it diagnosed soon.

Can I just clear P06A7?+

You can, but if a sensor or wire is shorting the reference it returns quickly, usually with other sensor codes; find the short instead.

Read & clear P06A7 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX