Fault code & missfire


New member
Just had a diagnostic run on my Mk6 GTi and I'm having the code p0172, misfire on cylinder 1, I really really need help here as this misfire is stressing me right out! I've had the advice of an airflow mass meter sensor being thrown out due to having a k&n panel air filter, I've had the cam shaft sensor changed, all plugs now NGK and all Bosch coil packs, a full service and still getting the check engi e light showing, and to rub salt in the wounds I was due a re map today and was turned away due to this fault! And I'm on my last nerve with it before I hastily hand it to a dealership to be robbed and have it fixed that way!! Please please help me if you can!


Autocross Newbie
You've gone deep into the pool already. Since you've already addressed the MAF and it's a misfire on a single cylinder consistently it might be time to look at possibly a bad fuel injector.

How many miles? Did you look at your plugs when you changed them, notice cylinder 1 looking different?