FabSwingers.com forum: Boring car post...........

By (user no longer on site) OP
over a year ago

Any body had the p0340 camshaft position sensor error? Car management light comes on but if I cut the engine and restart it it goes off, idles rough and cuts out now and then??? Already changed the sensor with a genuine part.

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By *ucky1Man
over a year ago

a straightjacket

I'd ask Jeremy Clarkson, I'm sure he's got a profile on fab and he's a proper petrolhead

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By (user no longer on site)
over a year ago

Could it be that the camshaft is not in the right position!

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By (user no longer on site) OP
over a year ago

"Could it be that the camshaft is not in the right position!"

Had the timing checked and its in sync.

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By *ocialSmocialMan
over a year ago

South West

Is that a Vauxhall? Could be the actual ECU...

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By *avebi48Man
over a year ago

Lordswood

sure they removed any sealing/seating rings? that'd put the sensor slightly out of position and cause mis-reads.

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By (user no longer on site) OP
over a year ago

"Is that a Vauxhall? Could be the actual ECU... "

Has crossed my mind, I was also told the EGR valve shares the same power source so it could bring up the "camshaft sensor" error sounds a bit of a long shot to me, don't want to be buying parts it don't really need.

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By *hortieWoman
over a year ago

Northampton

checked the wiring from the sensor?

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By (user no longer on site)
over a year ago

If it runs then put some tape over the error message. Problem solved

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By *inaTitzTV/TS
over a year ago

Titz Towers, North Notts

I'll go put the kettle on.

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By (user no longer on site)
over a year ago

"Any body had the p0340 camshaft position sensor error? Car management light comes on but if I cut the engine and restart it it goes off, idles rough and cuts out now and then??? Already changed the sensor with a genuine part."

http://www.obd-codes.com/p0340 try that link might give you an idea

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By (user no longer on site) OP
over a year ago

http://www.obd-codes.com/p0340 try that link might give you an idea "

Cheers, but not getting much info apart from what I already know. Thinks it's going to be a process of elimination

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By (user no longer on site) OP
over a year ago

"I'll go put the kettle on.

And maybe sum choccy biscuits Plz

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By (user no longer on site)
over a year ago

Is this in English ?

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By (user no longer on site)
over a year ago

OBD codes are there to guide you to the fault.

As you've already changed the sensor, it's clear that the diagnostics are working fine.

As you also mention that it's running rough, that, to me, would have ruled out a bad sensor.

Is it Petrol or Diesel?

If petrol, try removing a plug lead while it's running (if you can) and see if there's a change in how the engine runs. Do this for each cylinder. If you remove a lead and there's no change it could indicate an ignition fault (bad plug, lead or even coil pack)

If it's not this, then it could be down to fueling.

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By (user no longer on site) OP
over a year ago

"OBD codes are there to guide you to the fault.

As you've already changed the sensor, it's clear that the diagnostics are working fine.

As you also mention that it's running rough, that, to me, would have ruled out a bad sensor.

Is it Petrol or Diesel?

If it's not this, then it could be down to fueling.

It's petrol, the engine sounds like its misfiring at times, unfortunately I cant cant test each cylinder as its on a coilpack, thanks for advice tho

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By (user no longer on site)
over a year ago

Have you had a code reader connected up? There may be some 'pending' codes stored too

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By (user no longer on site) OP
over a year ago

At the moment I'm using Dashcommand software on my iPhone with the wifi connector for odb2 port (not sure how accurate this is) but I've also done the pedal test but there's just that one code coming up with none pending.

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By *obbytupperMan
over a year ago

Menston near Ilkley

"At the moment I'm using Dashcommand software on my iPhone with the wifi connector for odb2 port (not sure how accurate this is) but I've also done the pedal test but there's just that one code coming up with none pending."

Have you checked your rear view mirror?

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By (user no longer on site)
over a year ago

Blockages in the egr can throw up the same fault as its a shared power source

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By (user no longer on site)
over a year ago

What car is it?

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By *eavenNhellCouple
over a year ago

carrbrook stalybridge

"OBD codes are there to guide you to the fault.

As you've already changed the sensor, it's clear that the diagnostics are working fine.

As you also mention that it's running rough, that, to me, would have ruled out a bad sensor.

Is it Petrol or Diesel?

If it's not this, then it could be down to fueling.

Ignition timing on modern cars is controlled by the ECU and relies on sensors such as the crankshaft position sensor. Since you mention that you've had that checked, then the issue lies somewhere else"
if you have changed the sensor and it hasnt cleared the fault have you re fitted the original sensor as the new one could be faulty and masking it actualy had this with a renault espace ( yes i know ) MAF senor sending error codes after swopping for brand new one not cleared fault much scratching of head untill local mechanic had a look and found BOTH sensors to be faulty replaced with another new one and bingo fault cleared just a thought

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By *enithWoman
over a year ago

closer than you think

"I'll go put the kettle on.

Got any Bourbon biscuits to dunk?

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By (user no longer on site)
over a year ago

It sounds like your dilithium crystal is fucked

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By (user no longer on site)
over a year ago

Did you use a genuine sensor? Hundreds of times I've seen people fit non-OEM parts and they've not cleared the faults (Renault, Vauxhall, Saab and Alfa are 4 prime examples). If you have fitted a genuine part then, as someone else mentioned, was the washer from the old one removed?

You say the timing has been checked, a lot of cars now require cam-locking tools and can't be visually checked, The car would run like a bag of nails if the belt has slipped a tooth.

Some vehicles also require the timing belt to be removed/replaced if the cam sensor fails.

It's highly unlikely to be the EGR valve on a petrol, unless it's an electrical fault.

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By (user no longer on site)
over a year ago

"It sounds like your dilithium crystal is fucked"

Voyager FTW!

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By *izzy RascallMan
over a year ago

Cardiff

"I'll go put the kettle on.

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By *he Master JMan
over a year ago

Southall

"I'll go put the kettle on.

Try putting a blender on the back like in back to the future and also check that nobody has stuck a potato up the exhaust

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By (user no longer on site)
over a year ago

Disconnect the egr valve sensor

You don't need it anyway and see if it makes a difference

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By (user no longer on site)
over a year ago

"Disconnect the egr valve sensor

You don't need it anyway and see if it makes a difference "

Maybe to see if it makes a difference but EGR is related to emmissions and disconnecting the EGR sensor (or other parts of EGR system) may throw a code an illuminate your SES light permanently which is a MoT failure

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By *iuliettaWoman
over a year ago

DEVIZES

Any system light is an MOT failure unless you can get it to go off during the MOT !

are you getting the OBD codes through software or from the car? with mine, I turn the ignition on and off quickly 3 times and it brings up the OBD data on the dashboard.

check through the history to see if there are any other uncleared faults and try a forum for your type of car

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By (user no longer on site) OP
over a year ago

Thanks for the advice guys, think I'll blank the EGR with a plate so I can rule out the EGR there is a way to do it without that throwing out a EGR valve code, oh it's a Astra engine code z16xep

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By (user no longer on site)
over a year ago

"Any system light is an MOT failure unless you can get it to go off during the MOT !

are you getting the OBD codes through software or from the car? with mine, I turn the ignition on and off quickly 3 times and it brings up the OBD data on the dashboard.

check through the history to see if there are any other uncleared faults and try a forum for your type of car"

Actually having the engine warning light is only an advisory. The emissions light (generally associated with the DPF on diesel cars) is a failure, as is the airbag light.

The EML is not a failure.

Has the OP considered that the crank sensor may also be at fault? It works in tandem with the cam sensor.

We still need to know what the car is too as some different marques use the OBD2 along with their own codes.

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By (user no longer on site)
over a year ago

As a Vauxhall Mechanic I can tell you that most cutting out issues are usually down to the crank sensor. Cutting out due to the crank sensor usually only occurs when the engine is hot, as the heat from the engine expands and contracts the sensor so they break inside (the wires connecting to it also go brittle)

Also as already stated you need to get the codes read with a diagnostic box like Opcom (Anything else is shite compared to the opcom) but then the results have to be interpreted.

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By (user no longer on site)
over a year ago

I'm pretty sure I read somewhere about new rules on the mot where all the lights have to light up and then go out when you start the engine or its a failure!

Also I think there introducing a test on the egr(as so many of them get removed) and that's a fine and a failure if it's been removed.

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By (user no longer on site)
over a year ago

I'm fairly familiar with OBD2 because the car I drive was designed for the market where OBD2 first appeared in 1996 - USA

My car is a 1996.

Had a PC interface for many years but now have a genuine dedicated scanner.

If anyone in my local area ever needs an engine code reading / reseting, give me a shout, as my scantool is compatible with all protocols.

The only things I can not scan for at present are Airbags and ABS for anything other than USA vehicles, but when I can download the firmware, I intend to flash it with EU and JAP. This will leave only French Vehicles (for some reason the frogs had to be unique).

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By *iuliettaWoman
over a year ago

DEVIZES

Actually having the engine warning light is only an advisory. The emissions light (generally associated with the DPF on diesel cars) is a failure, as is the airbag light.

The EML is not a failure.

Theres so many lights on on mine, its hard to remember which are MOT failures

being short of leg but large of breast, I have the seat so close I cant get out of the car so have to slide the seat back every time breaking several contacts by the looks of it!

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By (user no longer on site)
over a year ago

I think i'll read this later - it may help me sleep!

On the other hand - all this manly talk makes me horny too!

Soooooo - sleep - or porn and rabbit time (again!) - decisions decisions!!

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By *ire_bladeMan
over a year ago

Manchester

What colour is it

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By (user no longer on site)
over a year ago

"I'm pretty sure I read somewhere about new rules on the mot where all the lights have to light up and then go out when you start the engine or its a failure!

Also I think there introducing a test on the egr(as so many of them get removed) and that's a fine and a failure if it's been removed."

The airbag light has to illuminate and extinguish otherwise it's a fail. If, however, it doesn't illuminate at all it's an advisory.

EML light is an advisory only.

You may be confusing the EGR with the DPF. Since October it has been an MOT failure if the DPF has been removed. However, it is only a visual inspection, so an empty DPF can be fitted and as long as the vehicle passes the smoke test then it will pass.

EGR valves are blanked and deleted almost as a matter of routine because they cause more harm than good and after a few thousand miles can make emissions considerably worse due to restricting the flow of air in the inlet manifold.

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By (user no longer on site)
over a year ago

"I'm fairly familiar with OBD2 because the car I drive was designed for the market where OBD2 first appeared in 1996 - USA

My car is a 1996.

Had a PC interface for many years but now have a genuine dedicated scanner.

If anyone in my local area ever needs an engine code reading / reseting, give me a shout, as my scantool is compatible with all protocols.

If you're using a KKL interface you can bridge a couple of pins to be able to read the other modules, as long as your software allows you to.

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By (user no longer on site)
over a year ago

"As a Vauxhall Mechanic I can tell you that most cutting out issues are usually down to the crank sensor. Cutting out due to the crank sensor usually only occurs when the engine is hot, as the heat from the engine expands and contracts the sensor so they break inside (the wires connecting to it also go brittle)

Also as already stated you need to get the codes read with a diagnostic box like Opcom (Anything else is shite compared to the opcom) but then the results have to be interpreted."

Depends on the car. Opcom isn't great on a few.

I agree with you on the crank sensor though.

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By (user no longer on site)
over a year ago

"EGR valves are blanked and deleted almost as a matter of routine because they cause more harm than good and after a few thousand miles can make emissions considerably worse due to restricting the flow of air in the inlet manifold."

Actually, on the larger engined version of my car, in later years, EGR was no longer fitted (can't remember which years) - but vehicle went out of production in 2002.

Regarding Dash lights and the MoT

(I'm quite friendly with the chaps at the local testing station as I went to school with one of their wives)

ABS light. Must illuminate and then go out. If it doesn't illuminate or doesn't go out then it is a fail.

Same with Airbag.

Same with the SES or Engine Management light or whatever you want to call it.

Bear in mind that usually the SES illuminates for codes likely to affect emissions.

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By *eMontresMan
over a year ago

Halesowen

Don't forget to test both CPS with a multimeter - you should be able to hunt down what resistance range it should show - obviously, if it's open circuit, then it's buggered

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By (user no longer on site)
over a year ago

Actually, on the larger engined version of my car, in later years, EGR was no longer fitted (can't remember which years) - but vehicle went out of production in 2002.

Regarding Dash lights and the MoT

(I'm quite friendly with the chaps at the local testing station as I went to school with one of their wives)

ABS light. Must illuminate and then go out. If it doesn't illuminate or doesn't go out then it is a fail.

Same with Airbag.

Same with the SES or Engine Management light or whatever you want to call it.

Bear in mind that usually the SES illuminates for codes likely to affect emissions."

Your mate needs to read the revised regs.

Airbag light is only a fail if it remains lit. The airbag light should light up and then go straight out. If it doesn't light up at all it's an advisory (because it doesn't indicate a fault).

EML light is an advisory.

You are correct about the ABS, but that was never mentioned.

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