MAP pressure sensor fault C32
Thread Starter
Joined: Jan 2009
Posts: 1,106
Likes: 85
From: Lebanon
Cls63 & C32
MAP pressure sensor fault C32
This is my first post here, I live in Lebanon, I own a C32 02, I have installed some modes the last few months:
LET 185 pulley, LET tune, LET phenolic spacers/Needswings gaskets,
SL55 y and Hoses, K&N air filters, 4 cats removed, -10C, Johnson Pump, IK20 plugs.
But after I installed the Pulley a fault code on Star Diag appears:
B28 pressure sensor short circuit to positive p0108
I replaced the MAP sensor and the fault reappears, did any one have an idea about that?
Also the car did not work well with the tune, Jerry told me to buy the LM-1 for reading the A/F ratio cause we don't have here Dynos, so next few days I'll install it, get the A/F ratio and resend him the ECU.
What do u recomand guys for an HE: code3, LFP or eurocharged...??
Thanks.
LET 185 pulley, LET tune, LET phenolic spacers/Needswings gaskets,
SL55 y and Hoses, K&N air filters, 4 cats removed, -10C, Johnson Pump, IK20 plugs.
But after I installed the Pulley a fault code on Star Diag appears:
B28 pressure sensor short circuit to positive p0108
I replaced the MAP sensor and the fault reappears, did any one have an idea about that?
Also the car did not work well with the tune, Jerry told me to buy the LM-1 for reading the A/F ratio cause we don't have here Dynos, so next few days I'll install it, get the A/F ratio and resend him the ECU.
What do u recomand guys for an HE: code3, LFP or eurocharged...??
Thanks.
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Posts: 4,856
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02 C32 AMG
This is my first post here, I live in Lebanon, I own a C32 02, I have installed some modes the last few months:
LET 185 pulley, LET tune, LET phenolic spacers/Needswings gaskets,
SL55 y and Hoses, K&N air filters, 4 cats removed, -10C, Johnson Pump, IK20 plugs.
But after I installed the Pulley a fault code on Star Diag appears:
B28 pressure sensor short circuit to positive p0108
I replaced the MAP sensor and the fault reappears, did any one have an idea about that?
Also the car did not work well with the tune, Jerry told me to buy the LM-1 for reading the A/F ratio cause we don't have here Dynos, so next few days I'll install it, get the A/F ratio and resend him the ECU.
What do u recomand guys for an HE: code3, LFP or eurocharged...??
Thanks.
LET 185 pulley, LET tune, LET phenolic spacers/Needswings gaskets,
SL55 y and Hoses, K&N air filters, 4 cats removed, -10C, Johnson Pump, IK20 plugs.
But after I installed the Pulley a fault code on Star Diag appears:
B28 pressure sensor short circuit to positive p0108
I replaced the MAP sensor and the fault reappears, did any one have an idea about that?
Also the car did not work well with the tune, Jerry told me to buy the LM-1 for reading the A/F ratio cause we don't have here Dynos, so next few days I'll install it, get the A/F ratio and resend him the ECU.
What do u recomand guys for an HE: code3, LFP or eurocharged...??
Thanks.
you removed all four cats? eww...how does that sound? i have heard clips and it is not pretty
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Joined: May 2008
Posts: 251
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From: Aberdeen, MD
CLA
Exactly how is your car not working well? Does your S/C disengage under part/WOT?
I have the same code followed by P20D4 Load Limit Active (P1999). What is the part number of the MAP sensor you replaced? The new sensor should be 005-153-72-28.
I have the same code followed by P20D4 Load Limit Active (P1999). What is the part number of the MAP sensor you replaced? The new sensor should be 005-153-72-28.
Thread Starter
Joined: Jan 2009
Posts: 1,106
Likes: 85
From: Lebanon
Cls63 & C32
Yes I removed the 4 cats, here we don't care about pollutions, i replaced the front cats by straight pipes and the rear by a custom muffle: very high sound (owsome) specially at high rev, yes there is little clips at low rev under part throttle but its ok i enjoy the sound.
No my S/C does not disengage, I have replaced the MAP sensor with the same number that was on the old sensor: 004-153-33-28, my MAP code is followed by "malfunction of secondary air injection" code but i think these 2 codes are not related.
The issue is that i want to be sure that the car does not show codes especialy pressure code before i resend the ECU.
No my S/C does not disengage, I have replaced the MAP sensor with the same number that was on the old sensor: 004-153-33-28, my MAP code is followed by "malfunction of secondary air injection" code but i think these 2 codes are not related.
The issue is that i want to be sure that the car does not show codes especialy pressure code before i resend the ECU.
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02 C32 AMG
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
I also have a P20D4 code along with P2027 (I think). Something to do with the B28 component (aka MAP sensor). I also get IAT of between 185-205 at which point the supercharger refuses to make any boost.
I'm taking a wholesale aproach. I have ordered the Johnson pump, the MAP sensor and the IAT sensor. To replace the MAP sensor you need to get to the Air Distribution Y-pipe by removing the air filter boxes and the supercharger air distributors.
I'm taking a wholesale aproach. I have ordered the Johnson pump, the MAP sensor and the IAT sensor. To replace the MAP sensor you need to get to the Air Distribution Y-pipe by removing the air filter boxes and the supercharger air distributors.
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Senior Member
Joined: May 2008
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From: Aberdeen, MD
CLA
Thread Starter
Joined: Jan 2009
Posts: 1,106
Likes: 85
From: Lebanon
Cls63 & C32
I have changed the MAP sensor without taking off the air distributors but it is somehow difficult. I installed a new OEM sensor 004-153-33-28 (no bar capacity on it), the fault code reappeared.
I think this fault code do not effect anything it is only a high limit fault like "Eleventeen" said.
I installed the LM-1 : below 5200: A/F= low 12, between 5200 to 6200: A/F= mid 15.
I am running lean at high rpm i will send the ECU next week.
I think this fault code do not effect anything it is only a high limit fault like "Eleventeen" said.
I installed the LM-1 : below 5200: A/F= low 12, between 5200 to 6200: A/F= mid 15.
I am running lean at high rpm i will send the ECU next week.
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02 C32 AMG
hmm....i'm just looking to upgrade mine so it doesnt throw codes at 22psi......just in case i somehow end up running, idk, 23-24psi....somehow. just wondering if anyone has UPGRADED it to a larger MAP sensor (can read more than the stock one)
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Eurocharged Performance ML63 and TT lambo
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C32 AMG
Two BAR would be enough(29psi)
Last edited by Forza1; Apr 5, 2009 at 08:29 PM. Reason: More info
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
The OEM sensor is rated at 0.2 up to 2.5 bar. This is about 36.23 PSI. Subtract from it 14.7 PSI at sea level and get max PSI reading of 21.53. So, you would need a minimum of a 3 bar sensor.
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From: Aberdeen, MD
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I went OEM -but the old part has been replaced with a new part (# above). The new one looks a little bit different but not sure if the internals were changed. The load limit problem is still there although not as frequent.
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From: Surprise, AZ
2005 Crossfire SRT6
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
This VC2 Clamp looks very interesting. It looks like the ECU may not need reprogramming and may stop activating boost related fault codes. Has anyone done this and how safe is it to run 22+ PSI boost?
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LET C32 2002
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From: In a box
W211 E55
The problem is in the tuning. The end-user is not always the best individual to setup the unit.
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C32 AMG W203
C32 AMG MAP SENSOR
This data is from http://www.maxparts.ru/index.php?pag...art_id=1644316
The spec. is 10 - 265 kpa (1.45 - 38.435 psi), but I don't think it is correct.
This data is from http://www.maxparts.ru/index.php?pag...art_id=1644316
The spec. is 10 - 265 kpa (1.45 - 38.435 psi), but I don't think it is correct.
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From: Surprise, AZ
2005 Crossfire SRT6
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mercedes C220CDI
Hello I have a problem on my 220 CDI, which does not exceed 3000 rpm and then stops the hen I accelerate there. Sensor fault diagnosis after rennet B28 if someone can send me a photo sensor to tell me his position in the engine thank you.
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c32
hi, my c32 wont start, for a change! any ideas where i could get a wiring diagram from for the rear sam?, think the problem may be there, the clip marked number 1 in the rear sam had somehow started to melt, but when i moved the wires around it started, but then nothing so i figured it must be a dodgy wire in the boot, i got a new clip and pins , chnged it , plugged it back in and it wont fire(Same problem as strart), so maybe the clip wasnt the problem, fuelpump doesnt prime, if you put a live to them they work?, and why did it work when i messed with the wiring, must be a problem in boot?, any help would be great as it is looking pretty grim at moment. cheers
