Lack of power and Check engine light
Thread Starter
Junior Member
Joined: Jul 2010
Posts: 27
Likes: 0
From: Vancouver
C230 Coupe
Lack of power and Check engine light
I was driving around today and I noticed my car lost some power in all gears. It would drive, but as if the supercharger wasn't working. I can hear it though.
Then, the check engine light came on. The car drives fine, it's just gutless now.
I have no idea what the problem is.
2002 C230 Kompressor, 117,000 kms.
Then, the check engine light came on. The car drives fine, it's just gutless now.
I have no idea what the problem is.
2002 C230 Kompressor, 117,000 kms.
Banned
Joined: Aug 2010
Posts: 1,073
Likes: 1
From: North San diego
C320 2002
I was driving around today and I noticed my car lost some power in all gears. It would drive, but as if the supercharger wasn't working. I can hear it though.
Then, the check engine light came on. The car drives fine, it's just gutless now.
I have no idea what the problem is.
2002 C230 Kompressor, 117,000 kms.
Then, the check engine light came on. The car drives fine, it's just gutless now.
I have no idea what the problem is.
2002 C230 Kompressor, 117,000 kms.
My grandfathers c320 is a year older then mine.. But doesn't have anywhere near the power mine does.. I floored his car and a check engine light came on.. Came to find out it was misfiring changed his wires and plugs now the car hauls again =D
Super Member
Joined: Aug 2009
Posts: 868
Likes: 0
From: Orlando, FL
C240
You go to your local autozone or similar store, like advanced auto parts, and borrow their obdII scanner. Plug into the port under steering column. The guy should be able to help you once you plug it in. I have reason to believe your car is misfiring, but we'll see.
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Senior Member
Joined: Sep 2008
Posts: 331
Likes: 9
From: Bangkok, Thailand
W124, W203, W204, W251
P2036 Secondary air injection: malfunction (function chain) : Air flow is too low.
P2039 Recirculating air flap actuator : Adaptation Emergency running
P2039 Recirculating air flap actuator : Adaptation Emergency running
Last edited by Utahkompressor; Oct 25, 2010 at 07:47 PM.
Thread Starter
Junior Member
Joined: Jul 2010
Posts: 27
Likes: 0
From: Vancouver
C230 Coupe
I doubt anything is wrong with the supercharger, because when I cleared the check engine light, the car drove normal again, with good power. After 2 days the car started acting up again (losing power) and the engine light came on again.
I'll do a voltage test on the o2.
I'll do a voltage test on the o2.
Senior Member
Joined: Sep 2008
Posts: 331
Likes: 9
From: Bangkok, Thailand
W124, W203, W204, W251
Well...our W203s use wideband o2 sensors which mean the ECU has the ability to adjust air/fuel mixture according to o2 readings. In your case, looks like the ECU does not receive readings from the o2 sensor, so it does not know where to adjust the mixture. Thus, the ECU runs in a fail safe mode(richen the mixture and disable the supercharger to avoid damaging the engine) The ECU forced the supercharged recirculation flap open to reduce boost, so you get P2039. And Secondary air injection system uses air from the supercharger, but with the recirculation flap open, there is not enough air entering the system...that's why you get P2036.
So, I would fix the P2031 first and erase all the codes.
Then see if P2036 and P2039 come back...which i think it should not.
If it comes back, you might have a problem the supercharger.
Hope this helps!
So, I would fix the P2031 first and erase all the codes.
Then see if P2036 and P2039 come back...which i think it should not.
If it comes back, you might have a problem the supercharger.
Hope this helps!
Thread Starter
Junior Member
Joined: Jul 2010
Posts: 27
Likes: 0
From: Vancouver
C230 Coupe
Well...our W203s use wideband o2 sensors which mean the ECU has the ability to adjust air/fuel mixture according to o2 readings. In your case, looks like the ECU does not receive readings from the o2 sensor, so it does not know where to adjust the mixture. Thus, the ECU runs in a fail safe mode(richen the mixture and disable the supercharger to avoid damaging the engine) The ECU forced the supercharged recirculation flap open to reduce boost, so you get P2039. And Secondary air injection system uses air from the supercharger, but with the recirculation flap open, there is not enough air entering the system...that's why you get P2036.
So, I would fix the P2031 first and erase all the codes.
Then see if P2036 and P2039 come back...which i think it should not.
If it comes back, you might have a problem the supercharger.
Hope this helps!
So, I would fix the P2031 first and erase all the codes.
Then see if P2036 and P2039 come back...which i think it should not.
If it comes back, you might have a problem the supercharger.
Hope this helps!
Junior Member
Joined: Feb 2012
Posts: 36
Likes: 0
2002 C230 k
Just replaced My 02 Downstream, and all my codes cleared except for the P2039...
-Did you ever get the problem fixed? i Reckon you did since you stopped posting?
I really hope my Super Charger isn't faulty. I did do the cold air intake mod" (K&N air intake mod. airbox deletion for the cylinder K&N.)Not really cold air either.
Any advice on this issue?
-Did you ever get the problem fixed? i Reckon you did since you stopped posting?
I really hope my Super Charger isn't faulty. I did do the cold air intake mod" (K&N air intake mod. airbox deletion for the cylinder K&N.)Not really cold air either.
Any advice on this issue?
