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W215 Engine Fault : P0106 & P0123

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W215 Engine Fault : P0106 & P0123

 
Old 10-10-2017, 03:38 PM
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W215 Engine Fault : P0106 & P0123

Hello Everyone!

The check engine sign appeared about a week ago just after I tried to accelerate faster. And then it took nearly 30 secs to go from 0-20kph -_- . The problem would go after the engine is switched off. The car is experiencing no problem if I'am accelerating slowly. So before taking my car to any mechanic, I decided to check the error codes & therefore purchased a Bluetooth OBD2 Scan Tool & installed Torque Pro app on my mobile device. I got these 2 error codes :-

1- P0106 - Powertrain
Manifold Absolute Presure/Barometric Pressure Circuit Range/Performance Problem

2- P0123 - Powertrain
Throttle/Pedal Position Sensor/Switch A Circuit High Input

Please if anyone experienced similar issues do advice and help me out.

Thanks

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Old 10-10-2017, 04:32 PM
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Check for oil/corrosion in the harness plugs at the TB and the M/E. From there, further diag is required for each specific code using the actual values function in the sds or similar scanner. These cars are not DIY friendly.
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Old 10-11-2017, 03:47 AM
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Your Map sensor and gas pedal are faulty . Both are easy to replace . Don't buy the pedal used as they gave a high defect rate
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Old 10-11-2017, 10:24 PM
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The MAP code is a range/performance code, they can set when the pedal is faulty, as the car checks pedal position and VE to determine what the MAP should be, and if it doesn't match it will set that code. So fix the pedal issue first. They do fail quite often.
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Old 10-12-2017, 01:14 PM
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Thanks ItalianJoe1 & Tusabes for your valuable advice.
I will proceed to replace the pedals 1st & then see if the problem is solved. To avoid buying a wrong one, can you provide me the part number or the exact name ?

Also, Right now what Im really struggling is finding the Cigar fuse. I know there are 2 fuse boxes on the front engine bay and 1 at the rear seat. Can someone please take a picture of another fuse box location ? Im searching for fuse 86

Thanks
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Old 10-13-2017, 05:33 PM
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Cigar fuse is on the right side of the dash. Not under the hood. There's a small panel visible when the door is open, behind it is a 9 fuse bar, it's on the bottom. F86.

2203000004 or 2203000104 are the pedal part #, for a 99-02 and an 03-06 respectively, I don't know what year your CL is.
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Aref (10-16-2017)
Old 10-14-2017, 03:29 AM
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My pedal would work fine , unless you press the pedal to the floor , triggering the kickdown switch . Doing so will activate limp mode . I think that's what you are experiencing

I could use it everyday without problem it i don't accelerate so hard that i press the pedal to the floor. As soon As I floored the pedal , it would go into limp mode

Last edited by tusabes; 10-14-2017 at 03:32 AM.
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Old 10-16-2017, 09:24 AM
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Originally Posted by tusabes View Post
My pedal would work fine , unless you press the pedal to the floor , triggering the kickdown switch . Doing so will activate limp mode . I think that's what you are experiencing

I could use it everyday without problem it i don't accelerate so hard that i press the pedal to the floor. As soon As I floored the pedal , it would go into limp mode
Yes. That's exactly what I'm experiencing! I hope fixing that will make the "Check Engine" light go off.
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Old 10-16-2017, 07:46 PM
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Yep that's your pedal

get a new one and be sure it's Mercedes Brand not aftermarket
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