The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2017 Audi A4 2.0T Misfire - Rough Idle and CEL

0

David L. · rep 0 · May 22, 4:22 AM · 1 replies · solved · Question

Hey everyone,

I'm having some trouble with my 2017 Audi A4 2.0T Quattro (B9 chassis). Recently, it started running really rough, especially at idle. It feels like it's misfiring pretty consistently, and the check engine light came on.

I scanned it with my OBD-II reader, and I'm getting a P0302 code, indicating a misfire on cylinder 2. Sometimes, it feels like it struggles a bit under acceleration too. The car has about 75,000 miles on it.

I've heard these engines can be prone to ignition coil or spark plug issues. Any thoughts on what I should check first? Is this something I can tackle myself, or should I head straight to the dealer? Thanks for any advice!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:22 AM

0

ClearTheCode guidance (Audi · Diagnostics & codes)

Summary: For 2017 Audi A4 2.0T Misfire - Rough Idle and CEL, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: Hey everyone,

I'm having some trouble with my 2017 Audi A4 2.0T Quattro (B9 chassis). Recently, it started running really rough, especially at idle. It feels like it's misfiring pretty consistently, and the check engine light came on.

I scanned it with my OBD-II reader, and I'm getting a P0302 code, indicating a misfire on cylinder 2. Sometimes, it feels like it struggles a bit under acceleratio…

This is educational guidance, not a substitute for hands-on diagnosis.

Menu

Help & account