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Author Topic: 0170/0173 Fuel trim malfunction banks 1&2  (Read 2436 times)

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Impact Pete

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0170/0173 Fuel trim malfunction banks 1&2
« on: 31 March 2010, 16:34:41 »
Still have this fault codes coming up, someone suggested either cleaning mass air flow meter or vac pipes, vac pipes all seemed fine and I had the pipe off after the air filter to check meter which looked spotless,
Am I missing something? could this be anything else?

Side note I also had missfire codes on cylinder 2 and 6 which has led me to change the ignition coil pack, there was a bit of water in the back two but as the coil packs had been previously eroded could this of let the water in?

just started up perfectly, will miss fire codes go or do they need clearing?
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henryd

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #1 on: 31 March 2010, 16:39:18 »
I think that the misfire codes will disapear after a few start ups,if not you will have to get them deleted
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kcl

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #2 on: 31 March 2010, 16:43:44 »
You can not determine visually if MAF is faulty and cleaning is very seldom the cure. New ones available for 50-100 EUR and replacement is known as the only cure for 0170&0173
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Impact Pete

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #3 on: 31 March 2010, 16:45:22 »
Quote
You can not determine visually if MAF is faulty and cleaning is very seldom the cure. New ones available for 50-100 EUR and replacement is known as the only cure for 0170&0173

With that in mind, what harm if any is there if not sorted?
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kcl

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #4 on: 31 March 2010, 16:54:14 »
At first, no harm. For a longer period, the engine is running on wrong mixture which is based on the "basic" air-fuel- figure due to lack of/wrong information from MAF. Possible failures/problems in the future are same as mis-tuned carburator in the old days, dirty spark plugs, poor running, higher fuel consumption, busted cats (fuel getting to catalyzers). Cats would be the issue to me to change the MAF. Save a few pence now and spend thousands replacing cats (all four on 2,6)
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Impact Pete

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #5 on: 31 March 2010, 17:10:14 »
Ok would want someone to confirm it is at fault before spending £100 on a plasic pipe with a small meter inside :-?

Also If I had not had missfire problem and checked codes how would I of known this problem existed! :-/
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feeutfo

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #6 on: 31 March 2010, 17:19:53 »
maf or air leak, you dont mention high tick over so would go for new maf personally, cleaning just finishes them off ime.
« Last Edit: 31 March 2010, 17:20:38 by chrisgixer »
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TheBoy

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #7 on: 31 March 2010, 17:23:22 »
Given your location, I'd be tempted to see if a certain admin is available to put tech2 on it before changing parts at random, potentially introducing more faults ;)
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Impact Pete

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #8 on: 31 March 2010, 17:27:13 »
Quote
Given your location, I'd be tempted to see if a certain admin is available to put tech2 on it before changing parts at random, potentially introducing more faults ;)

Good idea, I guess he is busy sorting yours ;D

Is he bribed with hard cash or beer! ;)
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Marks DTM Calib

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #9 on: 31 March 2010, 17:27:57 »
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Marks DTM Calib

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #10 on: 31 March 2010, 17:28:30 »
Quote
Quote
Given your location, I'd be tempted to see if a certain admin is available to put tech2 on it before changing parts at random, potentially introducing more faults ;)

Good idea, I guess he is busy sorting yours ;D

Is he bribed with hard cash or beer! ;)


Can do this evening if its of use
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Impact Pete

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #11 on: 31 March 2010, 17:35:45 »
Quote
Quote
Quote
Given your location, I'd be tempted to see if a certain admin is available to put tech2 on it before changing parts at random, potentially introducing more faults ;)

Good idea, I guess he is busy sorting yours ;D

Is he bribed with hard cash or beer! ;)


Can do this evening if its of use

I'm going out at 7.30 so not got much time, just ironing out the cars problems before it tows a caravan this weekend! will have to sort another time would be happier knowing whats up for sure, Darth Loo-Knee changed the cam covers gaskets 4 weeks ago and cleared all the codes then so It can't be a one off.
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Welung666

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #12 on: 31 March 2010, 21:17:10 »
Which way you heading with the tin tent?
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Impact Pete

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #13 on: 01 April 2010, 11:55:32 »
Quote
Which way you heading with the tin tent?

Hereford!
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Dave C

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Re: 0170/0173 Fuel trim malfunction banks 1&2
« Reply #14 on: 02 April 2010, 11:03:11 »
Last year my 2.6 CD got the same exact codes, turned out i had some corrosion on the face of the sensor in the MAF, even though the tech 2 said the MAF was working ok.

I got a replacement MAF for £30 - £40, i know some people on this forum only say go for original vauxhall parts and the cheap ones tend to give up soon after fitting. However have had mine for the past 5 months and it seems to be still going strong.

As KCL says it could effect further parts of the exhaust system. Soon after fitting the MAF the emission light came on again and I got the dreaded 420-430 Cat efficiency codes.

I think it happened because i drove the car for quite a few miles before i changed the MAF, so it has been quite a few worrying weeks thinking I might need to change the Cats.

Out of desperation i tried Cataclean in the fuel several weeks ago and took the car for an italian tune up.

Nothing seemed to work straight away but last Saturday the codes cleared themselves and the Emission Light is no longer on and has stayed off. 

I have my MOT at the end of this month so will find out then if the Cats are working properly.

Dave

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