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Mark
Mark, Peugeot Certified Technician
Category: Peugeot
Satisfied Customers: 1504
Experience:  Fully qualified technician and MOT tester.
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Hi, I have a Pug 206 1.4 Sport (2005 model) and when the car

Resolved Question:

Hi, I have a Pug 206 1.4 Sport (2005 model) and when the car is driven from cold it lacks power. Once it warms up the problem goes.
The local garage have done a full service on the car, changed the air flow sensor and lambda sensor but too no avail. There are no stored codes when the car is placed on the diagnostics machine.
Any advice would be gratefully received.
Submitted: 3 years ago.
Category: Peugeot
Expert:  Mark replied 3 years ago.

Mark :

Hello, my name is XXXXX XXXXX I will try help you with this.

Mark :

Does the engine start ok when it is cold?

Customer:

No starting problems at all

Mark :

Do you have access to a scan tool?

Customer:

unfortunately not.

Mark :

Did it get new sparkplugs, air filter and fuel filter at the service?

Customer:

yes, plugs and filters changed but the problem remained.

Mark :

Including fuel filter?

Customer:

That I would have to check, I was assured all filters were done

Mark :

Was the air mass meter and o2 sensor replaced for this fault?

Customer:

The air mass meter was but that was the only one that was changed

Mark :

You said the lambda was changed also?

Mark :

Lambda is o2

Customer:

sorry, different terminology.

Mark :

o2 easier to type.

Customer:

ok

Mark :

So was o2 also changed for this fault?

Customer:

there was a code on the diagnostics that indicated the o2 sensor was faulty so in an attempt to cure the fault this was also changed.

Customer:

no further fault codes recorded though

Mark :

Do you know what the code number was?

Customer:

sorry no

Mark :

I would say most likely cause is the engine temperature sensor but first make sure the fuel filter was replaced at the service.

Customer:

sounds like a plan. I will giver the garage a call tmrw and see what actual filters they changed

Mark :

Ok.

Customer:

thanks for your help

Mark :

The sensor can be checked with the scan tool.

Customer:

OK

Mark :

Make sure the reading from it matches the actual engine temperature, especially as the engine is heating up.

Customer:

I will pass on the advice, it's been frustrating

Mark :

I suspect it could be reading hotter than normal which cuts the fuel back a bit. Not so much a problem with a hot engine but limits power when the engine is cold.

Customer:

Sounds viable and well worth a go

Mark :

If the sensor is reading a plausible value it wont set a fault code.

Customer:

but in essence it could be malfunctioning?

Mark :

Yes

Customer:

OK, I will pass it all on and make sure they check the engine temp sensor, its a very good lead.

Mark :

Hope it helps.

Mark :

Please remember to rate my assistance.

Mark :

Thanks.

Mark :

Mark.

Customer:

Cheers, XXXXX XXXXX way forward and if it doesn't cure the fault as least it's been eliminated.

Mark :

Cheers

Mark and other Peugeot Specialists are ready to help you