M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

Ml320 loses acceleration

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Old Sep 17, 2011 | 03:47 PM
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charli411's Avatar
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ml 320
Ml320 loses acceleration

I have a 2001 ml320 that will loses acceleration while driving! When I pull the car over to side of the road it appear as though engine hasn't stopped but still no acceleration. I then shut the car off and immediately start it and I have power again. Took to three different mechanics and all came up with same code p0221 but they all had different fixes
1) Unplug all sensors and see what is causing issue
2) Replace throttle contol body
3) Flash CPU (which I don't think can be done)

I have recently replaced the MAF so I don't think that is the issue. Should I replace the throttle control sensor? EGR valve? These are a couple things I have read on other post that people have replaced.

Please help
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Old Sep 25, 2011 | 04:11 PM
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redcoupe's Avatar
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11 ML350
Where did you get the MAF from? dealer, used
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Old Oct 11, 2011 | 04:49 PM
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From: East of I-287 South
01 ML55, 91 Supra Turbo, 05 Audi S4
check the throttle position sensor, I had same issue until I replaced it.
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