mercedes w220, 2002, s400 cdi - no power, p2013

**mafia666** · 18th February, 2013, 08:35 PM

Hi, everybody. i have problem with this mercedes s class, 4.0 cdi, 2002 year made. Turbo is not kicking in, on live data boost pressure is always 800 hPa, wiring to boost sensor is good, sensor is new, from dealer. i tried to blow air into this sensor - parameter in live data doesn't change. if i disconnect power supply to ecu, and connect it back, i can start car and it runs ok for 10 seconds - with good power and etc. after that - no power, no turbo. there is only one trouble code in ecu and it is always active: p2013 - boost pressure / barometric pressure implausible or smthg like this. does anyone faced this problem ever? i spent whole day - no results.

p.s. there is lot of black smoke from one of the turbine, when it kicks in for that short time, but i think it's not related....

**genius76** · 18th February, 2013, 09:07 PM

Originally Posted by mafia666

wiring to boost sensor is good

no it is not

Sensor disconnected - there another code?

If it is not satisfied because of the wiring, disconnect the sensor and hook up several different ohm resistor - someone changes on the live date?

**smayer** · 18th February, 2013, 11:43 PM

Your problem is in ECU. If you don?t find PM me.

**mafia666** · 18th February, 2013, 11:45 PM

If i unplug sensor there is another trouble code. I tried different voltages to ecu pin - no change.

**mafia666** · 18th February, 2013, 11:50 PM

Originally Posted by smayer

Your problem is in ECU. If you don?t find PM me.

I also think its ecu.

**zoyzoyni** · 19th February, 2013, 12:09 AM

IS VERY related.... IT MEANS exhaust system dingy FOUL.take out exhaust from side you see the smoke and broke it,disconnected.plus check lash to turbo.

**mafia666** · 19th February, 2013, 01:33 AM

Originally Posted by zoyzoyni

IS VERY related.... IT MEANS exhaust system dingy FOUL.take out exhaust from side you see the smoke and broke it,disconnected.plus check lash to turbo.

Trouble code is on when ign is on, i dont need to start the car. I checked turbo actuators with star - working. Black smoke - maybe worn turbo?

**M Espino** · 19th February, 2013, 04:31 AM

What code is in the ecm ?

**M Espino** · 19th February, 2013, 04:40 AM

This is a big vacuum leak in the system

**mafia666** · 19th February, 2013, 11:12 AM

Originally Posted by M Espino

What code is in the ecm ?

code is p2013, one thing bothers me is that, i cannot delete this trouble code even on ignition on. car is not running - this trouble code is on. Shouldn't be, that boost sensor shows atmospheric pressure on ignition on? it doesn't change at all also if i blow air in it with air compressor. i disconnect ecu, and connect back - turbo kicks in for two times, after that - no turbo and no power.

about air leek - i am not sure 100 %, because i did not take all intake apart, but from top and front part on the engine there is no air leek. all pipes all aluminum in this car.

**mafia666** · 19th February, 2013, 11:45 AM

forgot to mention one thing - two egrs in this car are blocked with blind, but they are ecu is not reprogrammed. does this could cause problem? Does those cars should drive with egr blocked and not removed from ecu?

**oldford** · 19th February, 2013, 07:40 PM

Have you checked the signal from the barometric sensor?
Maybe that's out of range.

**zoyzoyni** · 19th February, 2013, 10:40 PM

p2013 refer to B28/ presure sensor short signal value.first check wiring after actual values must be from 4...6 to 5,1v.sensor is just near to oil check metal pointer.if everything is ok next is to unplug turbo electric cablle from potesiometer,this one is smoke.your problem is turbo charger...

**mafia666** · 19th February, 2013, 11:17 PM

Originally Posted by zoyzoyni

p2013 refer to B28/ presure sensor short signal value.first check wiring after actual values must be from 4...6 to 5,1v.sensor is just near to oil check metal pointer.if everything is ok next is to unplug turbo electric cablle from potesiometer,this one is smoke.your problem is turbo charger...

I checked pressure sensor wiring before. now i stripped car - can not find any air leak, also i cannot reach the turbines to check axis and check if they are not loose. what will happen if i unplug cable from turbo actuator or what ever it is? car should run on one turbo? is it possible that pressure from one good turbo will go out through another bad turbo? How does those cars behave, if one turbo is broken?
some pictures from my work. i am just dreaming about next benz like this.

p.s. it's a bit of work to replace alternator belt on these cars

**mafia666** · 19th February, 2013, 11:20 PM

Originally Posted by oldford

Have you checked the signal from the barometric sensor?
Maybe that's out of range.

I checked it with scope. Power supply is 5V, on ign. on signal wire there is around 4 volts. Live data in star diagnosis does not change if I apply compressed air, scope detects increased voltage.

Sensor is new - from dealer, wires are checked - all good.