P0486

EGR Sensor B Circuit

Q: Is it safe to drive with P0486?

Usually yes in the short term, but EGR faults can hurt fuel economy and raise emissions, so don't leave it unfixed for long.

Q: Can I just clear P0486?

You can, but it returns until the EGR sensor or its wiring is repaired.

Auxiliary emissions control Generic OBD-II Medium

What it means

P0486 means the ECM has detected a fault in the exhaust gas recirculation (EGR) sensor "B" circuit. This sensor reports the EGR valve's position or flow so the ECM can meter recirculated exhaust correctly. It's usually a sensor, wiring, or carbon-related issue — the car generally still drives, but EGR faults can cause rough running, worse fuel economy, and higher emissions until repaired.

Medium

Can I keep driving? Yes, but watch it — the car will usually drive, though EGR faults can cause rough running and higher emissions; have it fixed before it affects fuel economy or fails an emissions test.

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
Possible reduced performance or slightly rough running
Reduced fuel economy
Increased emissions / may fail an emissions test

Common causes

Most likely first

Faulty EGR position/feedback sensor BLikely
Open or short in the sensor wiringCommon
Corroded or loose electrical connectorCommon
Carbon buildup affecting the EGR valve/sensor movementLess often
Faulty ECM/PCM (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data to see what the EGR sensor was reporting when it set.
Inspect the EGR sensor connector and wiring for damage, heat, and corrosion.
Check the sensor's reference voltage and signal wire for opens or shorts.
Inspect the EGR valve for carbon buildup that could bind its position feedback.
Repair wiring faults; if the circuit is good, replace the EGR sensor. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0486?+

Usually yes in the short term, but EGR faults can hurt fuel economy and raise emissions, so don't leave it unfixed for long.

Can I just clear P0486?+

You can, but it returns until the EGR sensor or its wiring is repaired.

Read & clear P0486 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