VW Amarok 2.0 TDI In Limp Mode P0651 P0236 P1440 P0322

Vw amarok came in with a complaint of lack of power, going into limp mode, and a glow plug warning light on the dash. The fault codes were scanned with VCDS, multiple codes were stored in the engine ECU. They all pointed towards sensors with 5 volt references, and even a fault for the voltage reference B - the 5v reference all the sensors used. Checking through the wiring diagrams confirmed this. However, the vehicle wasn't now in limp mode and was performing fine. All the sensors logging codes were checked for their respective 5v reference and all was good. I then removed the top of the EGR valve and found water ingress and heavy corrosion on all the electrical contacts. This was found to be the cause of the 5v reference problem, and in would have been shorting it to ground through the water/corrosion on the contacts.

[@jjusta9064]

There is some dam clever people out there and know what there doing had this trouble with mine 2 years ago main dealer couldn’t sort it..... last resort I took it to a back street garage about 20 miles from me and hey it was this told me within 30 seconds of hooking up laptop to it!!

[@edward9110]

Hello,
Is this the EGR valve that’s after the throttle body or the EGR valve at the exhaust cooler?

[@BLahBLahBLahBLah584]

Hi mate, I know this is an old video, but I was having an intermittent egr fault, the check engine light would come on but no change in drivability. I removed the case like you did, abs found oil inside it, they're not supposed to have any oil in them are they?

[@FourRingsAuto]

No oil should be in there.

[@focusmaramba4053]

Have the same engine: no check light no glow plug light... Help

[@samuelortega7296]

have you ever done this before to a 3.0 tdi? I'm having a problem with my q7 code P0046 i just want to know if I have to replace the actuator or the whole turbo

[@FourRingsAuto]

If you buy just the actuator, you need an audi special tool to be able to do the calibration of the actuator. That's the only way so you'd have to take it to an audi dealer.

[@FourRingsAuto]

Or replace the turbo

[@samuelortega544]

@@FourRingsAuto ok, I appreciate the answer, I bet that the dealer will say, replace the turbo 😪 but thanks for the info

[@padraicscarry188]

Remap and fix it permanently