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Author Topic: P0170 + lack of power - anyone had it ?  (Read 2057 times)

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san

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P0170 + lack of power - anyone had it ?
« on: 27 January 2010, 00:29:32 »
Hello all!!

I had the code P0170 twice and cleared it out, took out the MAF for clear contacts and no more alarms but lack of power after 40mph.

Anyone had this problem before ?

Tks
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Proz

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Re: P0170 + lack of power - anyone had it ?
« Reply #1 on: 27 January 2010, 07:56:57 »
Hi
Yes i,ve had it .... caused hesitation and a flat spot on acceleration .... car just felt gutless .
I got a new maf and the change was instant for the better  :y
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san

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Re: P0170 + lack of power - anyone had it ?
« Reply #2 on: 28 January 2010, 00:42:26 »
Proz, Thanks.

I got the car this morning going to the work.
Disconnected MAF and start without problems, but foot down and no power.
Came back to park. connected MAF.
Car went normal but no power when running more than 40.
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Proz

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Re: P0170 + lack of power - anyone had it ?
« Reply #3 on: 28 January 2010, 00:51:44 »
When i had my problems i was getting the code P0170 and then something about lean .... which i assume was the mixture and hence why it was gutless ..... i did post on here about it probly a year ago but at that time no one was able to say it was the maf because there was no maf code ... i took the chance cause i was offered a genuine maf for 35 quid and it cured it ....  Can you get any live data as to wat the maf is reporting at idle and say 2000 revs and i can compare it to mine now ??
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Proz

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Re: P0170 + lack of power - anyone had it ?
« Reply #4 on: 28 January 2010, 00:53:49 »
Im sure cleaning the maf doesnt help either .... im not sure why but im sure it was something i read on here when i was having my problems with P0170  :y .... it was so long ago i cant remember ... sorry  :-/
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Re: P0170 + lack of power - anyone had it ?
« Reply #5 on: 28 January 2010, 00:56:36 »
take Maf off and look inside should see nice clean glass strips with lines of copper in them, if they look dull then they prob burnt out :y
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Proz

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Re: P0170 + lack of power - anyone had it ?
« Reply #6 on: 28 January 2010, 01:01:30 »
This is the problem i had .... but because there was no " maf " code in diagnostics it was thought to be ok .....  then it was suggested on here that i try the maf .... as said i found a genuine one cheap and took the chance and worked for me .... was like driving a different car  :y
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Kevin Wood

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Re: P0170 + lack of power - anyone had it ?
« Reply #7 on: 28 January 2010, 09:49:14 »
MAF needs to be totally goosed before you get a MAF related code, and MAF codes can also be spurious due to other faults.

Remember the code is not saying "the MAF is faulty" it's saying that the ECU software considers the input from the MAF to be inconsistent with the other inputs it is getting.

On the MAF failures that I have seen, the MAF has simply lost sensitivity so that it is still giving plausible readings but the fuelling has gone far enough out for the car to be running poorly and giving fuel trim fault codes.

Easiest way to diagnose is to substitute a known good MAF from another car. Before that, though, make sure there are no air leaks in the induction and exhaust systems, that the air filter is not clogged. Check the simple (cheap) things first. :y

Kevin
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Kevin Wood

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Re: P0170 + lack of power - anyone had it ?
« Reply #8 on: 28 January 2010, 09:51:26 »
San - I see you are not too far away from me. If you'd like me to have a look over it with the Tech 2 I'd be happy to help.

Kevin
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cmeonthemove

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Re: P0170 + lack of power - anyone had it ?
« Reply #9 on: 28 January 2010, 10:10:33 »
I had a similar issue on, of all things, a petrol powered Transit a few years ago. No code on diagnostics but I recognised the symptoms from when I had a Vectra fall foul of Tesco's bout of dodgy fuel, so I changed the MAF and all was well. Going by your symptoms and the other replies, I would also recommend getting a new MAF.
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Re: P0170 + lack of power - anyone had it ?
« Reply #10 on: 28 January 2010, 13:43:58 »
Quote
I had a similar issue on, of all things, a petrol powered Transit a few years ago. No code on diagnostics but I recognised the symptoms from when I had a Vectra fall foul of Tesco's bout of dodgy fuel, so I changed the MAF and all was well. Going by your symptoms and the other replies, I would also recommend getting a new MAF.

Sure i rad a post not to long ago saying that its actually the same MAF unit in some of the omegas as it is in the transits (well some of them). :y
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Re: P0170 + lack of power - anyone had it ?
« Reply #11 on: 28 January 2010, 19:20:06 »
Quote

On the MAF failures that I have seen, the MAF has simply lost sensitivity so that it is still giving plausible readings but the fuelling has gone far enough out for the car to be running poorly and giving fuel trim fault codes.

This exactly what happened to me, i suspect mine was causing overfuelling which eventually goosed the cat. I had a new cat and a MAF and it's like driving a different car.
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cmeonthemove

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Re: P0170 + lack of power - anyone had it ?
« Reply #12 on: 28 January 2010, 22:43:11 »
Quote
Quote
I had a similar issue on, of all things, a petrol powered Transit a few years ago. No code on diagnostics but I recognised the symptoms from when I had a Vectra fall foul of Tesco's bout of dodgy fuel, so I changed the MAF and all was well. Going by your symptoms and the other replies, I would also recommend getting a new MAF.

Sure i rad a post not to long ago saying that its actually the same MAF unit in some of the omegas as it is in the transits (well some of them). :y

Not aware of that but it might be. The petrol Transit had the same 2.0l DOHC engine found in the Scorpio.
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san

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Re: P0170 + lack of power - anyone had it ?
« Reply #13 on: 29 January 2010, 12:39:46 »
I want thank you all the guys for the replies.

I will try to get a new MAF soon.  I hope it does not stop in the hard shoulder.

Regards

Sanderly
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san

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Re: P0170 + lack of power - anyone had it ?
« Reply #14 on: 07 February 2010, 21:24:02 »
hello !!!

Finally changed my MAF with a new one and everything working fine (until now)

To help others a list with problems:

- Code: P0170
- Car with lack of power
- Start but it fails when driving.
- Clean up the MAF didn't help only stops the light going off.


Thanks for all replies  :y :y
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