P0475

Exhaust Pressure Control Valve A

Q: Is it safe to drive with P0475?

Short trips are generally fine, but reduced power and a valve stuck in the wrong position can hurt economy and, on diesels, DPF regeneration. Repair it before long hauls.

Q: Can I just clear P0475?

If the valve is sticking or the wiring is faulty, the code comes back. Fix the mechanical or electrical cause first.

Exhaust / emissions Generic OBD-II Medium

What it means

P0475 indicates a fault with the "A" exhaust pressure control valve — the valve (common on diesels) that regulates exhaust backpressure to help the engine warm up, brake, or run its emissions equipment. A stuck or electrically faulty valve typically shows up as reduced power, poor fuel economy, or slow warm-up rather than a no-start.

Medium

Can I keep driving? Usually drivable — you may notice reduced power, poor economy, or a slow warm-up, but the fault won't normally leave you stranded.

Real-world scan data

Seen in

205

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0475 scans

P2BAEin 63.9% of scans

P0016in 62.9% of scans

P0069in 62.9% 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
Reduced engine power or sluggish acceleration
Poor fuel economy
Slow warm-up in cold weather (on diesels)
Excessive exhaust smoke in some cases

Common causes

Most likely first

Faulty exhaust pressure control valve or actuatorLikely
Carbon buildup causing the valve to bind or stickCommon
Damaged, corroded, or shorted wiring or connector at the valveCommon
Failed valve control solenoidLess often
ECM fault (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and inspect the exhaust pressure control valve and its linkage for carbon binding or seizure.
Check the valve's wiring and connector for damage, corrosion, or a poor connection.
Command the valve with a scan tool (where supported) and confirm it moves through its range.
Replace the valve or actuator if it won't move freely, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0475?+

Short trips are generally fine, but reduced power and a valve stuck in the wrong position can hurt economy and, on diesels, DPF regeneration. Repair it before long hauls.

Can I just clear P0475?+

If the valve is sticking or the wiring is faulty, the code comes back. Fix the mechanical or electrical cause first.

Read & clear P0475 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