HELP NEEDED

[mocheck]

Hi Folks,
Is there anybody in the Glasgow area with knowledge of the dreaded P0400 code ,I have replaced the EGR valve,MAF sensor,3 Vacuum solenoids and any split pipes I can find but alas after 10 secs light on and limp mode, sorry if this is not in the right part of the forum ,any help would be appreciated.
Thank you in advance
Mocheck.

[stretch]

Vac pipes can be visually be ok but still might have perished or pin holes you can't see. With it being one of the cheapest/easiest jobs it's worth replacing them all.

[mocheck]

OK Frontera winning the battle,I have now replaced EGR valve (new )MAP sensor(new)MAF sensor(new)3 x vacuum solenoid valves all vacuum hoses replaced with silicon hoses and I still have the same fault code up P400 anyone any idea's what to do next the Fronty is in really nice condition half leather,wood trim wood steering wheel all in all to good to scrap but not going to be spending much more on it .
Thanks in advance
Mocheck

[stretch]

When I had P400 it was the MAF did you replace it with a bosch one or aftermarket? did you replace all the vac pipes ie including the one to the vac pump by the bulkhead and on the axles?

[mocheck]

Replaced all the pipes I could see but not on the axle will have a look and check them replaced up to metal pipes that go down and then from bottom of metal pipes to splitter bar/unit.
Thanks again will keep trying for now.
Mocheck

[mocheck]

Now done all the hoses I can find on or around axle but still have the dreaded light ?
Mocheck.

[stretch]

The maf did you replace with a bosch one?

[vauxsqueeks]

The maf did you replace with a bosch one?

This is important! OEM/Bosch Replacement?

I would also re-check your VAC pipes. I know you said that you replaced them, but when I did mine I had to take extra care on the VAC pump and the connections to the membrane valve thingys on the butterflys etc as these were still leaking.. If you did use OEM part, ( not second hand, as this could also be faulty ) but yes, p0400 and P0100 will be VAC related if the EGR is clean and MAF is replaced.

[mocheck]

I replaced the MAF sensor with a pattern one from a company called sensors .I went to silicon on all the hoses.
Cheers
Mocheck

[RatCav]

Pattern MAF sensors are notoriously unreliable. You need to use a Bosch one like people have said.