2006 Volvo S60 2.5T - MAF sensor issue

DianaPrince · Post by **DianaPrince** » 30 Jan 2019, 17:32

Recently replaced the MAF sensor after rough idle + CEL + “engine system service required” message + codes P0101 and P0170. It’s been about 3 weeks and now the CEL and engine system service message are back; throwing code P0101 again. Is the new sensor I installed a bunk part? Or is this something else? Super annoying

Post by **RickHaleParker** » 30 Jan 2019, 18:15

Possible source

1. Contact resistance or oxidation in the mass air flow (MAF) connectors
2. Air leakage in the intake system
3. Blocked intake system
4. Damaged mass air flow (MAF) sensor.

Check for 1,2 & 3.

1. Take some MAF cleaner, disconnect the wiring harness to the MAF. Clean the connector with the MAF cleaner. Reconnect.

2. Take a can of starting fluid and spray around the intake. If you hear the engine surge you found a leak. If you do find a leak stop spraying as soon as you hear the engine surge. Don't want to blow the engine to kingdom come.

3. Check to see if something got into the intake and is blocking the air flow. Air filter clean?

Post by **cn90** » 30 Jan 2019, 18:46

What BRAND is the MAF?

Post by **abscate** » 31 Jan 2019, 04:42

More likely a vacuum leak than a MAF failure can you read out fuel trims on your code reader ?