x trail 2.0l petrol throttle sensor problem - Nissan Forum
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post #1 of 23 Old Mar 8th, 2010, 02:36 PM Thread Starter
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x trail 2.0l petrol throttle sensor problem

hi,

hopefully someone can help me.

my x trail is a 2003 and the mil light came on and gave the fault code p0122,the throttle sensor.
i month down the line and two different throttle sensors and also the sensor at the pedal we are no further forward.

it just keeps saying its the sensor at fault when you plug it in,

anyone any ideas at all??

many thanks

ian

scotland
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post #2 of 23 Old Mar 8th, 2010, 04:27 PM
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Hi Ian,

Whoever is replacing your TPS and Accelerator Pedal Position Sensors needs to perform the idle relearn and pedal position re-learn as per THIS guide.

Cheers,
Jalal (Sydney, Australia)

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post #3 of 23 Old Mar 9th, 2010, 02:48 AM Thread Starter
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hi there,

thank you very much for this. i will take this to the garage where the cars is. dont think they have done this,could be the answer.

if this works i`ll walk all the way to sydney and shake your hand !!
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post #4 of 23 Old Mar 10th, 2010, 04:24 AM
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Quote:
Originally Posted by iannic70 View Post
if this works i`ll walk all the way to sydney and shake your hand !!
LOL No worries mate, but that's a super long walk Am sure we can meet somewhere in the middle. hahahaha

Cheers,
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post #5 of 23 Old Mar 10th, 2010, 03:58 PM Thread Starter
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hi,
not heard anything yet but it will be my luck i own the first x trail that never goes again !!

will let you know soon ,hopefully !!
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post #6 of 23 Old Mar 14th, 2010, 02:08 PM Thread Starter
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hi,

unfortunately we have tried the re-learn you suggested but still no go.

not looking good
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post #7 of 23 Old Mar 21st, 2010, 02:32 AM
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did the mechanic check the voltage ? it may not be the tps. how many km has your ride done ? have u ever cleaned the throttle body ?
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post #8 of 23 Old Mar 21st, 2010, 02:26 PM Thread Starter
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did the mechanic check the voltage ? it may not be the tps. how many km has your ride done ? have u ever cleaned the throttle body ?
hi,thanks for your reply

i`m sure we have checked the voltage and it is lower than it should be.
the car has done 56,000 miles,not sure what that is in km`s.

as far as i`m aware the tps has never been of the car. i have had it for 2 years now and done 14,000 miles without the slightest problem.

i did get a second hand tps and it does not work either with the same readings i`m sure, a new one is £914 plus vat, and if it doesnt work its yours to keep.

nissan have had a look but have no ideas as they say there isnt a problem here,which appears to be true as i cannot find another one on this planet with the same fault as mine.
ironically if you reset the car via the tester it works until you turn the car of and the mil comes on again.

its 6 weeks now and looking as though it wont turn a wheel again. if this is the case i will be gutted as my last car was a ford galaxy people carrier which died because of an immobiliser fault and it never went again either.

thinking of buying a bike !!!
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post #9 of 23 Old Mar 21st, 2010, 11:10 PM
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can you drive the truck when the MIL lights up. your posting wasn't clear about this point.

something to try ? run an earth wire from the throttle body to the car body.
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post #10 of 23 Old Mar 22nd, 2010, 08:13 AM Thread Starter
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can you drive the truck when the MIL lights up. your posting wasn't clear about this point.

something to try ? run an earth wire from the throttle body to the car body.
hi,

thanks again for your reply.

when the mil comes on it wont rev. when it is reset it does seem to work until you switch it of again.

i will get in touch with the garage and pass on what yoiu have suggested


have you heard of this problem before as i cannot find anyone who has?

thanks again

ian

edinburgh,scotland
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post #11 of 23 Old Mar 22nd, 2010, 08:42 AM
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when the mil comes on, it will not rev. then you are in limp mode.

if it were my ride, i would do the following

:clean the throttle body. i understand the code is a p0122, nothing related to the tb, but worth a try. many of us have cleaned the tb and each of us have a somewhat different method. check through the forum. the garage should be able to perform this relatively simple maintenance.

:run the earth too. it may or may not help. however, it does not cost much to do so. i have earthed my ride - don't find any difference.

:how is your battery and alternator's condition. i doubt this is the cause, but really no harm in checking. since your ride is two plus years since you purchased, i assume you have not changed the battery. in our region, batteries last two to three years average. in the uk, have no idea. moreover, you are not doing much milage (as you indicated) and this could drain the battery.

can't think of anything else.
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post #12 of 23 Old Mar 22nd, 2010, 07:34 PM Thread Starter
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Quote:
Originally Posted by TKH View Post
when the mil comes on, it will not rev. then you are in limp mode.

if it were my ride, i would do the following

:clean the throttle body. i understand the code is a p0122, nothing related to the tb, but worth a try. many of us have cleaned the tb and each of us have a somewhat different method. check through the forum. the garage should be able to perform this relatively simple maintenance.

:run the earth too. it may or may not help. however, it does not cost much to do so. i have earthed my ride - don't find any difference.

:how is your battery and alternator's condition. i doubt this is the cause, but really no harm in checking. since your ride is two plus years since you purchased, i assume you have not changed the battery. in our region, batteries last two to three years average. in the uk, have no idea. moreover, you are not doing much milage (as you indicated) and this could drain the battery.

can't think of anything else.
hi,

thanks again for your reply.

i`m sure the battery is the original from new though nor 100%.

i will copy this and e mail it to the garage and see how it goes

again,thanks for your time and advice

ian
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post #13 of 23 Old Mar 24th, 2010, 08:07 AM Thread Starter
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hi folks,

possibly good news at last.

the garage have just called me and they have found a broken wire in the harness coming through the bukhead !!!

i feel like i have won the lottery !!

thanks to all who suggested ideas

ian
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post #14 of 23 Old Mar 24th, 2010, 02:57 PM
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Good stuff Ian, glad it's all sorted.

Cheers,
Jalal (Sydney, Australia)

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post #15 of 23 Old Apr 28th, 2010, 09:00 PM
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TPS error - at least that's what the ecm thinks

Guys, here's a related challenge..

engine light came on, runs in fail safe mode (max 2000rpm), code 2135 (TPS) according to the shade tree mechanic test reported on this forum. had it scanned by the Nissan guys but as expected no great insights from them - they got a few TPS codes too and they recommended to replace the throttle/sensor assy again as expected.

what I've tried so far:
- cleaned throttle. WORKED! MIL gone, running normal - until 2 km later when hit a bump in the road. Car stalled. Cleaned, opened throttle again - car runs again but only in fail safe mode, with MIL on.
- replaced throttle/sensor assy by one from a wrecker. same issue. cleaned that throttle too and disconnected battery for 2 days. same issue. Would there be an issue with ecm now - as the shadetree mechanisc scan no longer works (can't get the MIL light to blink unlike a week a go), I have run engine a while without TPS harness connected?

can't visually find any TPS wiring issues - though don't know where to find the ecm to measure open circuits..

background: 2002 x-trail, manual, QR25. problems seem to have started (engine running rough - mainly at low revs) after getting bogged on a beach.

any views?
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