P06A6

Sensor Reference Voltage A Circuit Range/Performance

Q: Is it safe to drive with P06A6?

Only briefly. Because many sensors rely on this reference, the engine may run poorly or go into limp mode, and readings become unreliable. Diagnose it soon.

Q: Can I just clear P06A6?

It returns until the reference circuit is stable. Often one shorted sensor is pulling the whole reference off, so find and fix that first.

Sensor reference voltage Generic OBD-II High

What it means

P06A6 means the 5-volt reference the engine computer supplies to a group of sensors is out of its expected range. Because many sensors share this feed, one shorted sensor or a wiring fault can throw several readings off at once — so you'll often see multiple sensor codes and poor running alongside it.

High

Can I keep driving? May run poorly or drop into limp mode, since several sensors share this reference voltage. Drivable short-term, but expect erratic behaviour until fixed.

Real-world scan data

Seen in

146

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P06A6 scans

P0405in 41.1% of scans

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 stored at the same time
Rough running, hesitation, or reduced power / limp mode
Erratic gauge or sensor readings

Common causes

Most likely first

A shorted sensor dragging down the shared 5-volt reference lineLikely
Short-to-ground or short-to-voltage in the reference wiringCommon
Corroded or loose connector on a sensor sharing the referenceCommon
Internal ECM reference-voltage faultLess often

How to diagnose & fix

Work through it in order

Scan for all codes — several sensors going out of range together points to a shared reference problem.
Unplug sensors that share the 5V reference one at a time to see if the reading recovers (isolates a shorted sensor).
Inspect the reference wiring for a short to ground or to voltage.
Check connectors on the affected sensors for corrosion or spread pins.
If the wiring and sensors are good, the ECM's internal reference is suspect. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P06A6?+

Only briefly. Because many sensors rely on this reference, the engine may run poorly or go into limp mode, and readings become unreliable. Diagnose it soon.

Can I just clear P06A6?+

It returns until the reference circuit is stable. Often one shorted sensor is pulling the whole reference off, so find and fix that first.

Read & clear P06A6 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