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Thread: Engine fault light on / Juddering when hot

  1. #1
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    Default Engine fault light on / Juddering when hot

    I'm having more than my fair share of problems with my 1.8 Vectra. The clutch wore out recently and was duly replaced and today I've put in a new starter after the solenoid packed up last week.

    I'm now left with another problem ...

    When the car fully warms up it judders when pulling away in first. I thought at first that this might be a fault with the new clutch but as the clutch was fine at first and the new problem is accompanied by the fault light coming on it's making me start to wonder whether it's not the clutch at all but an incorrect fuel mixture when the engine has reached normal running temperature. When it's cold everything is fine.

    I read the fault codes (before changing the starter) using the flashing light trick and got these...

    1495 - TCSPL Solenoid Circuit Malfunction (This one might, of course, be down to the faulty starter motor which i've now fixed - not sure?)

    0170 - Fuel Trim Malfunction (Bank 1)

    0335 - Crankshaft Position Sensor A Circuit Malfunction

    2193 – Really not sure what this one is? It's not on my list but Googling it came up with 'System Too Lean at Higher Load' but not particularly for a Vauxhall car.

    I'm wondering whether I might have a faulty lambda sensor which would explain why everything's OK until the engine gets hot. If it is a lambda, however, which should I change? Does 'bank 1' mean the top one on the exhaust manifold or the one on the pipe underneath? Also should I try cleaning them - some people say this is OK but others say it can ruin them completely.

    Really I'm guessing all of this based on reading other peoples threads on the forum! I'm trying to keep the cost down as I've already shelled out a fortune recently!

    Any help or ideas would be very welcome.

  2. #2
    Regular Member Caveman_nige's Avatar
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    Vehicle : Vectra and a Signum

    Trim : top of the line in both

    Engine : Z18XE,Z19DTH,Z20NET

    Year : 2006

    Default

    could well be the coils, a few 1.8 owners had suffered with this.. lambdas is another option though.. depends on what you want to try first.. what mileage have you done with this engine?

  3. #3
    Regular Member TimTay's Avatar
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    before you go replacing the lambda's i would get a member with opcom to do some live readouts to see if they are functioning correctly. bank1 refers to bank 1 of your cylinders as you do not have a v6 "2 banks" it will always say bank 1 0170 can be loads of different problems. turned out it was my inlaws timing was out a tooth after a new belt fitted. but was told by a few members on here to start with the cheaper option first which was a crankshaft sensor which i noticed you have a code for between that and cleaning out ya air flow meter would be a good start i think.

  4. #4
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

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    Do you have any way of reading live data?

    Have you got a multimeter?
    Could also be temp sensor

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    Thanks for all of the replies guys.

    In answer...

    CavemanNige - Car has done 75k miles.

    Timtay - Don't think it's the timing belt - it's been on for three years now. Will try cleaning air flow meter but erm, where is it exactly? I thought about the crankshaft sensor too - might give that a go.

    CritchVXD - Yes I do have a multimeter - what did you have in mind?

    Just been out in the car and the light is staying off, mind you wasn't fully up to temp. The codes will have been cleared of course by disconnecting the battery to do the starter this morning. Might need to let the fault recur and check the fault codes again.

  6. #6
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

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    Was going to say check the temp sensor, for voltage an resistance.
    When cold and warm.

    Maybe worth taking crank sensor off and giving it a clean with some carb cleaner.
    Is there a possibilty you knocked crank wire whilst change starter?

    Air flow meter if it's same as diesel vec will be on top of air box.

  7. #7
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    Thanks for the advice - I think, on balance, the crank sensor's the best bet. I've cleaned the connector etc and made sure it's secure so will see how it goes.

    My problem is that the fault only happens after driving for about half an hour when the engine's good and hot. So I can't easily test whether i've solved it, My drive into work is half an hour and the car usually starts juddering five minutes before I get there!

    I can pick up a new sensor for around £20 on the web so I might get one anyway.

  8. #8
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    I have a 52 plate 1.8 club and changed this and that! Well almost all the top. I then noticed, well observed that my problems were worse under load – checked the voltage and while under pressure (fan, lights, aircon etc) my battery slowly lost charge because the alternator was not strong enough to maintain the amount of volts required.

    My guess is that the regulator is iffy. While at idle everything is ok 14.4v charge but as soon as I put it under pressure it drops to <12.5v which is not sufficient to maintain smooth running.

    I have not changed it yet although I will have to before the winter. Tonight I switched on the demister and the air con and it started running rough and juddering. And I got weird error codes, it even flagged up the EGR which is mapped out and blanked off!

    It’s worth checking before you fork out a few hundred quid on this and that sensor (like what I did!)

  9. #9
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    Crank shaft speed sensor.

    only happens when hot / cruising speed.

    the signal breaks down due to heat and the result is th engine mis fires was its not sure how to fuel.

    you can prove this as you have a cam speed sensor you can unplug the crank speed sensor and take it out fpor a long drive and the fault wont occure but this is not a perminant fix and get a new one from vaux not EBAY.

  10. #10
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    Thanks Roswell - that sort of makes sense... but if I unplug the crank speed sensor wouldn't I then get the problem immediately even when the engine is cold?

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