My "check engine" light just poped on. What checks do I need to make to isolate the problem? Everything seems to be running normally.

thanks
Bill

If I remember correctly this car as an OBDII port that you can plug a code scanner into to get the engine code(s) - I would do that first then report back with that info.

__________________
1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K

Had the code read. It's PO400 which I'm told is an EGR Flow problem. What's the suggested fix please? And should this cause any problems on a 500 mile trip I'm suppose to take in next several days?

thanks
Bill

Can someone please help with the above?

thanks

Do a forum search here for P0400. There are many threads already on this exact code that should answer your questions.

__________________
'98 E300 turbodiesel

Advance auto or O'Reilly's or other McParts places will do it for free. Or give you the reader to do it yourself. Like MercFan said, get the codes read and post them here. There are quite a few W210 owners or former owners here on the forum who can help you out.

__________________

Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K

I believe the egr issue could be a simple vacuum connection loose. look over your engine compartment for loose or cracked vacuum lines.
if you take a trip with this error you will be running on limp mode, and will have lackluster performance.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Thanks for reply. Looked over top of engine and don't see any problems with the vacum lines. Should I look underneath as well? Owners manual says check engine light on indicates problem with fuel injection sysem. Would this egr fault be part of the fuel injection system?

Bill

Check teh vacuum lines from the egr (between charge air pipe and bottom of intake manifold) to the transducer mounted on the driver side wheel well. Make certain the "vent" exiting the transducer is open.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

The vacuum lines from the egr to the transducer look good. The hose that comes off the bottom of transducer goes to a plastic something that looks like a filter? How do I check the vent? Is it where this hose comes off the bottom of the transducer?

That is the filter, it vents to atmosphere. Just make sure it isnt clogged as that can trip a code.

Did you clear the code and it returned?

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Here's the EGR schedule from a 2007 posting by ScottMcPhee:

The exhaust gases are recirculated in line with the map stored in the IFI control module (N3/7) as soon as the following criteria are met:

* Coolant temperature between 60 °C and 110 °C
* Battery voltage 11 - 14 V
* Engine speed < 3000 rpm
* Fuel rack travel < 9 mm

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

These were my two questions:

"1. Any way I can get a look inside the valve to determine whether it is stuck open without taking the IM off?

2. I had asked before is there any chance the transducer electrical connection could be the problem and if so, how would I check?"

Still no answer to #1?

Re.#2, Based on replies, sounds like due to involvement of verifying a healthy transducer electrical feed, I should just proceed to pull IM to get at EGR valve, then open valve to see if it is stuck?

thanks

Sorry for the delay, haven't been on here for awhile. We disabled the EGR's on both our '98 and '99 (identical as regards this issue). The wiring referenced in the "how to" thread is under the black plastic cover, under the hood on passenger side at base of windshield. If you jack up the car, remove the belly pans, remove the aluminum charge air pipe (from the intercooler to the EGR housing) you might be able to look up into the EGR housing to see if the valve is stuck. At that point you might just as well take the manifold off since it's just those 20 or so torx bolts along the head, a really annoying clamp where the EGR pipe attaches to the EGR housing, and couple of vacuum lines.

If I remember correctly, our cars go into limp mode if this particular code is tripped. Much reduced power and speed, higher shift points, etc. I'm surprised that doesn't happen to yours.

Thanks Fred for the info. Believe someone had mentioned the limp mode before as a result of the EGR fault. My passing gear (turbo kick) defintely has been effected but I easily cruise at 80mph on interstate. Don't notice any difference in shift points or any other differences.

Re.#2, Based on replies, sounds like due to involvement of verifying a healthy transducer electrical feed, I should just not worry about that now and proceed to pull IM to get at EGR valve, then open valve to see if it is stuck? If valve isn't stuck, what do I check for?

thanks