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2000 Volvo S40, MAF code, won't idle and seems to have less power

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40

godschild72617
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2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by godschild72617 » Sat Nov 10, 2018 11:06 am

I have a 2000 Volvo S40, I will make a long story short. I replaced the MAF and the Map sensor. The car is stilling giving me a PS0102 Code. Also, now it wont idle and seems to have less power. I checked for frayed wires and visible air leaks. I don't want to keep throwing parts at it. I love it and know it still has some life in it. Can anyone help or possibly tell me what gives the MAF it's power. I am also have trouble getting my hands on a wiring diagram with reference and is not in Dutch. Any suggestions or help is greatly appreciated. Thanks all.
Last edited by matthew1 on Sat Nov 10, 2018 11:29 am, edited 1 time in total.



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matthew1
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by matthew1 » Sat Nov 10, 2018 11:31 am

What brand mass airflow sensor did you put in?


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godschild72617
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by godschild72617 » Sat Nov 10, 2018 12:01 pm

Remanned from Napa



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matthew1
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by matthew1 » Sun Nov 11, 2018 2:46 pm

Volvos are very sensitive to MAF brand. I've read about non-OEM MAFs working, but it's the exception.


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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

godschild72617
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by godschild72617 » Tue Dec 25, 2018 1:55 pm

I replaced the Mass Airflow sensor with a brand new OEM one. Check engine light went off and car will drive, but the minute I take my foot off the throttle it dies. Before I dish out $200 for a new Idle Air Control Valve, can anyone tell me if there is a way to test this first? Thanks for your help.



Techdowe
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by Techdowe » Wed Mar 27, 2019 10:55 am

I had a simillar problem with my 2000 S40. I replaced the MAF with an off brand that cost $20.The fault code cleared. But on my 2nd or 3rd trip i began experiencing problems and a MAF code came back not sure of the code number but it was MAF under reporting air flow. When parked with the engine at idle the motor would rev up to roughly 3000 RPM and drop like it was hitting the rev limiter. Foud the line from the manifold to the brake booster hand unseated at the manifold. Fixed that code and idle problem gone. Easiest way i have found to test MAF was using a handheld OBDII reader capable of live data stream wand ensuring voltage increases with application of throttle with engine running . The same can be done with a multimeter and back probing the MAF sensor cable.
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Techdowe
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by Techdowe » Wed Mar 27, 2019 10:56 am

Wow did t realise was that old of post hope it helps someone



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matthew1
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Re: 2000 Volvo S40, MAF code, won't idle and seems to have less power

Post by matthew1 » Thu Mar 28, 2019 12:28 am

It's fine. Good info is good info. :-)


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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

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