P0420

McSmallface · April 10, 2021, 16:27

I've cleaned the maf and it's drying out in the kitchen so I'll pop out tomorrow and refit and inspect the intake and filter etc and see how we get on.

Gaz mr-s · April 10, 2021, 17:09

Quote from: McSmallface on April 10, 2021, 16:27I've cleaned the maf and it's drying out in the kitchen so I'll pop out tomorrow and refit and inspect the intake and filter etc and see how we get on.

Just in case....hopefully you know it's not the blob at the bottom...

Ardent · April 10, 2021, 17:27

Or at least not all of it.

McSmallface · April 10, 2021, 20:12

Ok now I'm confused?

Gaz mr-s · April 10, 2021, 22:07

Quote from: McSmallface on April 10, 2021, 20:12Ok now I'm confused?

As was I until I found out. I believe the obvious blob is a temperature sensor. Hold the housing inverted & shine a light down inside it....the bit in there is the maf sensor.

McSmallface · April 10, 2021, 22:18

Ahhh I get you! Yeah I cleaned the external bulb and the two little internal bits

McSmallface · April 11, 2021, 15:39

So took the car out for 3 hours today and no codes present or pending so looks like it was the O2 throwing the original P0420 code and the MAF throwing the P0172/P0175.

Car feels miles better too since cleaning the MAF as it was filthy when it came off so I doubt it's ever been cleaned. Car feels quicker and more responsive now.

Ardent · April 11, 2021, 16:34

What a difference a spray makes.

Yep. Ecu now being fed better more truthful info to base its calcs on.