HAF

RAV4 II, 2.0 D4D 2005 persistent EGR trouble

Recommended Posts

Hi
First of all, sorry if there are gramma and spelling mistakes.. I'm not a native speeker.
I'm writing due to a problem/error code I can't get rid off.
On my 2005 Rav4 II 2.0 D4D I'm getting this P0400 EGR error... my mechanic can't find the problem.
So far I have tried the following: replacing MAF, EGR valve and turbo.
The mechanic have tested with 3 different diagnose programs (1 was original Toyota), checked the wires and connetions... and the error just keeps comming back.
If I reset the error in the ECU, it comes back after 5-10 km of driving.
So... any ideas on where I should start to look

Br
Jes 

Share this post


Link to post
Share on other sites
 

If your rav runs OK ,don't worry about it .....

Share this post


Link to post
Share on other sites

Did you change the scv valves , they bring up that error code as well, 

Share this post


Link to post
Share on other sites

Hi

Thanks for the replys... it's much appreciated  :rolleyes:

I'll just update all of you that has been reading my post.... it seems that the P0400 issue has been solved, I have just picked up the old wreck today, driven a little 380 km trip, and the engine light has not turned on, and there are no current or pending errors in the ECU... so happy days so far :biggrin: The car runs better, and is more responsive at low RPMs. 

Had the car back at the mechanic, and the poor guy is now bald after pulling all his hair off in frustration.

Anyway.. he went through all the electronics once more, he also borrowed a RAV4 like mine from a friend, where he dismounted parts and checked them on mine.

Complete intake side, complete exhaust side, EGR, MAF, ECU but same same.... BUT then he found out (don't know if he got some oxygen to his head, or the brain cooled down now he is bald) that the problem was caused due to carbon build-up in the channel in the cylinder head, between the EGR valve and intake manifold... cleaned it out... and job done!!!!

The next little issue I have to look at, is during acceleration the car behaves a little like the turbo is overboosting, but I find that hard to be the case, now the turbo only has driven 3000 km, the fuel filter the same.... my first approach will be a Liqui Moly cure.. one of those with the machine... with a little luck it should clean the SCVs. if that's not enough I'll give it a "mechanic on a spray can" air intake cleaner of some kind and hope for the best.

Hope I don't have to take it to the mechanic for some time now, it has cost me a minor fortune this year.

Okay.... think that's all for this time... have a great weekend guys.

Jes    

  

Edited by HAF
missed some text

Share this post


Link to post
Share on other sites

Thanks for the update 

Share this post


Link to post
Share on other sites

On 11/11/2017 at 4:27 PM, atkiman said:

Did you change the scv valves , they bring up that error code as well, 

That's what it was with our 55 plate!

Share this post


Link to post
Share on other sites

I haven't changed the SCVs, now the problem got fixed by cleaning out the carbon build ups in the cylinder head.

But the engine has a ticking noise when it's under load, and I have SCV's in thoughts.. so I have ordered a Danish produced product called Bell-Add system cleaner one shot.. I's like Liqui Moly Diesel Purge.... and I hope that it will clean the SCVs and injectors, so I can reduce the ticking noise... will give it a new fuel filter too, cause this stuff has to go in the fuel tank, when it's almost empty, then a 40-50 km.drive with the stuff... and I have no clue how much s... is in the bottom of the fuel tank.

Should get the stuff in the middle of next week, so I will try it out the following weekend.... I'll give you guys a heads up afterwards.

If it won't work, I'll probably try to clean the SCVs like in this youtube video: 

 

Jes

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now