Peugeot 406 HDi - Limp home mode
Discussion
One of the cars on our fleet has developed an intermittent problem.
The car will occasionally get itself in 'Limp Home' Mode (ie: restricted revs etc.) It normally does this at speed on the motorway, but has just started doing it in traffic, on roundabouts etc and generally anywhere bloody inconvenient or dangerous.
Obviously I can't send it out to work like it, so today it's sitting outside losing me money.
I need to get it sorted fast. So any ideas greatly appreciated.
The anti-pollution light comes on whenever the fault rears its ugly head. The car has basically been neglected for 6 years and 300,000 miles, only getting engine oil changes and cambelts. We've sent all of our cars in for a full service since taking over... Oil, Filters, Belts, Brakes, Tracking etc.
This particular car only had it's full service 2 days ago, and had a core plug and layshaft on 3rd gear replaced at the same time.
Anyone got any idea whats causing this problem, what I can check or even how to fix it? My mechanic hasn't got a clue (he's just a servicing monkey really).
The car will occasionally get itself in 'Limp Home' Mode (ie: restricted revs etc.) It normally does this at speed on the motorway, but has just started doing it in traffic, on roundabouts etc and generally anywhere bloody inconvenient or dangerous.
Obviously I can't send it out to work like it, so today it's sitting outside losing me money.
I need to get it sorted fast. So any ideas greatly appreciated.
The anti-pollution light comes on whenever the fault rears its ugly head. The car has basically been neglected for 6 years and 300,000 miles, only getting engine oil changes and cambelts. We've sent all of our cars in for a full service since taking over... Oil, Filters, Belts, Brakes, Tracking etc.
This particular car only had it's full service 2 days ago, and had a core plug and layshaft on 3rd gear replaced at the same time.
Anyone got any idea whats causing this problem, what I can check or even how to fix it? My mechanic hasn't got a clue (he's just a servicing monkey really).
KingRichard said:
annodomini2 said:
You need to read the fault codes from the ECU, something is telling the ECU there is a problem, when this problem occurs a fault is logged and the resulting actions of said fault is to put the ECU in Limp Home Mode.
Is this main dealer stuff?
Not necessarily, most independents should have diagnostic equipment to pull codes out of the ECU and you can purchase scan-tools, reasonably priced, to do it yourself. I just bought one for $100 U.S. so I could pull codes from my Landy. It works on any OBDII vehicle.
Edited by Trooper2 on Wednesday 2nd May 11:20
KingRichard said:
annodomini2 said:
You need to read the fault codes from the ECU, something is telling the ECU there is a problem, when this problem occurs a fault is logged and the resulting actions of said fault is to put the ECU in Limp Home Mode.
Is this main dealer stuff?
We had a similar issue with one of our HDi Pugs which kept dropping into LOS mode - problem with fuel injection system. We took it to a very reputable fuel injection specialist and they advised that Peugeot do not release the software (to thrid parties) which reads the FULL fault code. Whilst third parties can tell from a part diagnostic code that a fault lies with the fuel injection system, for instance, the full fault code is needed to pinpoint the fault to a particular sensor or component..
Edited by SS2. on Wednesday 2nd May 11:26
SS2. said:
KingRichard said:
annodomini2 said:
You need to read the fault codes from the ECU, something is telling the ECU there is a problem, when this problem occurs a fault is logged and the resulting actions of said fault is to put the ECU in Limp Home Mode.
Is this main dealer stuff?
We had a similar issue with one of our HDi Pugs which kept dropping into LOS mode. Took it to a very reputable fuel injection specialist and they advised that Peugeot do not release the software which reads the FULL fault code. Whilst third parties can tell from a part fault code that a fault lies with the fuel injection system, for instance, the full fault code is needed to pinpoint the fault to a particular sensor or component.
Edited by SS2. on Wednesday 2nd May 11:24
Oh great
How much are diagnostics likely to cost at peugeot?
A freind of mine has a Pug 307 Hdi that started doing this. He took it to his dealer and they told him that the fins to the diesel pump had failed and were contaminating the deisel supply. In summary he was advised to drain the system and fit a new pump. All in all they quoted £2500.
He took the car to an indie and they performed a similar repair for £1200.
Needless to say, Peugeot took no responsibility for the break up of their Diesel fuel pumps.
He took the car to an indie and they performed a similar repair for £1200.
Needless to say, Peugeot took no responsibility for the break up of their Diesel fuel pumps.
SS2. said:
KingRichard said:
How much are diagnostics likely to cost at peugeot?
From memory, I think it was about £75.. Extortionate, IMO.. That is extortianate. "Diagnostics" for one hour on my VW were £45. Turns out that "computer-based diagnostics" were their idea oh swapping the air flow meter for a new one. Should have seen their face when i told them i wanted to buy the part and change it myself... took 10 mins for them to take it back off again and give me the car back. Plus the stealer then refused to sell me the part! Strange.
Firstly, if it is an emission related failure the OBD code will be read by ANY commercial or dedicated scanner. It is illegal to withold these codes.
Secondly, I doubt whether the 406 would have a particulate filter, but would suspect that perhaps the catalyst has failed - thus causing the limp home occurance.
Without the code you may never know.
Secondly, I doubt whether the 406 would have a particulate filter, but would suspect that perhaps the catalyst has failed - thus causing the limp home occurance.
Without the code you may never know.
rav said:
A freind of mine has a Pug 307 Hdi that started doing this. He took it to his dealer and they told him that the fins to the diesel pump had failed and were contaminating the deisel supply. In summary he was advised to drain the system and fit a new pump. All in all they quoted £2500.
He took the car to an indie and they performed a similar repair for £1200.
Needless to say, Peugeot took no responsibility for the break up of their Diesel fuel pumps.
He took the car to an indie and they performed a similar repair for £1200.
Needless to say, Peugeot took no responsibility for the break up of their Diesel fuel pumps.
So could I get diagnostics done at Pug? Then get my tame spanner monkey to fix the problem, or are they a bit coy about twhat's involved etc...?
Don't want to pay that rate of labour for more than necessary.
SJWB said:
Firstly, if it is an emission related failure the OBD code will be read by ANY commercial or dedicated scanner. It is illegal to withold these codes.
Secondly, I doubt whether the 406 would have a particulate filter, but would suspect that perhaps the catalyst has failed - thus causing the limp home occurance.
Without the code you may never know.
Secondly, I doubt whether the 406 would have a particulate filter, but would suspect that perhaps the catalyst has failed - thus causing the limp home occurance.
Without the code you may never know.
So anyone with diagnostics should be able to pinpoint the problem?
SJWB said:
Firstly, if it is an emission related failure the OBD code will be read by ANY commercial or dedicated scanner. It is illegal to withold these codes.
Secondly, I doubt whether the 406 would have a particulate filter, but would suspect that perhaps the catalyst has failed - thus causing the limp home occurance.
Without the code you may never know.
Secondly, I doubt whether the 406 would have a particulate filter, but would suspect that perhaps the catalyst has failed - thus causing the limp home occurance.
Without the code you may never know.
The scan-tool I just purchased will even pull proprietary codes for many manufacturers.
Gassing Station | General Gassing | Top of Page | What's New | My Stuff