Renault Laguna Trouble DF301

**lucasmaster** · 18th May, 2010, 09:43 AM

Hi.
We can't solve the problem with DTC DF301.
We replace turbocharger, MAF, clean EGR, check vacum lines, and replace two times pierburg valve. But with no luck, everytime when we accelerate we have DF301, and car lose power.

Maybee someone have problem with this DTC or have a file in english MR397LAGUNA1.pdf.

Thanks for any help. Regards
Lukasz

**Meat-Head** · 18th May, 2010, 09:07 PM

have had broken wires under the battery before rotten green no good

**Ashraf6119** · 18th May, 2010, 09:11 PM

Hi

Have a look in this attached file hope This Helps

Ash

**DCD** · 19th May, 2010, 01:57 PM

What DEF code are you getting? 1.DEF/2.DEF?

**tecnov** · 31st May, 2010, 10:16 PM

try checking the wiring that goes forom the accelarator pedal to the side of the door you may have fase contect on the conection pins.
P.S. sorry but my english is not very good.

best regards
tecnov

**dafdiagnos** · 31st May, 2010, 10:45 PM

df301 - inlet manifold air pressure fault - low pressure. check wiring at maf sensor for 5v feed, earth & if possible test with oscilloscope signal back to ecu. wiring to maf sensor a common fault on these

**rukass** · 9th June, 2010, 07:32 PM

hi

has solved the problem? have a similar problem in an espace 2.2 dCi!

any help, please!!

thanks

**DCD** · 10th June, 2010, 03:28 PM

Originally Posted by rukass

hi

has solved the problem? have a similar problem in an espace 2.2 dCi!

any help, please!!

thanks

Most common problem on G9T engine for lack of boost pressure is cracked inlet manifolds! You will notice oil residue around the front of manifold where it joins the swirl flaps.

**ripsnort40** · 5th August, 2010, 05:12 PM

Originally Posted by Ashraf6119

Hi

Have a look in this attached file hope This Helps

Ash

Newbie here. Not sure what I am doing! Have persistant DF301 fault code and going into limp home. Hoping to be able to download the PDF on this thread.
Cheers

**ripsnort40** · 5th August, 2010, 05:41 PM

Thanks. Looks v useful (Diesel injection fault finding - interpretation of results)

**drakov** · 5th August, 2010, 07:18 PM

Originally Posted by ripsnort40

Newbie here. Not sure what I am doing! Have persistant DF301 fault code and going into limp home. Hoping to be able to download the PDF on this thread.
Cheers

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**ripsnort40** · 5th August, 2010, 07:22 PM

Thanks to ashraaf6119's pdf, I started looking at testing turbo solenoid. Soon as I looked saw one of the hoses was off! Pushed it on and problem solved! Lesson is, look at the simple things first...