MAF and TPS Codes
Thread Starter
Member
Joined: Feb 2014
Posts: 134
Likes: 10
From: New Hampshire
C 32 AMG & FG2 Civic Si
MAF and TPS Codes
Hi guys, I posted this in the non-AMG section because it's for my C320 but this should really be the same for AMGs, too:
Long story short, I've got a check engine light and my C320 occasionally doesn't respond to throttle input and the engine dies shortly after startup. This happens intermittently. I can start up the car and have this issue, turn it off, restart it and it will be fine.
I've retrieved the following codes:
P0101 pending: Mass Air Flow (MAF) Circuit Range/Performance Problem
P0102: Mass Air Flow (MAF) Circuit Low Input
P0123 pending: Throttle/Petal Position Sensor/Switch A Circuit High Input
P0171 pending: System Too Lean (Bank 1)
P0221 pending: Throttle/Petal Position Sensor/Switch B Circuit Range/Performance Problem
I bought a new Bosch MAF and will probably install it tomorrow morning, but I'm not confident that that will fix my issue. I'm thinking about ordering a new accelerator pedal module with sensor if the new MAF doesn't help, but I want to first know if that's the only throttle sensor that can trigger the P0123 and P0221 codes. I would assume there is also some sort of sensor near the throttle body that would be related but I'm not sure if it would trigger these codes. If it would, then it's curious that I'm getting codes for two sensors that are right next to each other (the MAF and the TPS).
Any info or suggestions are appreciated. Thanks!
Long story short, I've got a check engine light and my C320 occasionally doesn't respond to throttle input and the engine dies shortly after startup. This happens intermittently. I can start up the car and have this issue, turn it off, restart it and it will be fine.
I've retrieved the following codes:
P0101 pending: Mass Air Flow (MAF) Circuit Range/Performance Problem
P0102: Mass Air Flow (MAF) Circuit Low Input
P0123 pending: Throttle/Petal Position Sensor/Switch A Circuit High Input
P0171 pending: System Too Lean (Bank 1)
P0221 pending: Throttle/Petal Position Sensor/Switch B Circuit Range/Performance Problem
I bought a new Bosch MAF and will probably install it tomorrow morning, but I'm not confident that that will fix my issue. I'm thinking about ordering a new accelerator pedal module with sensor if the new MAF doesn't help, but I want to first know if that's the only throttle sensor that can trigger the P0123 and P0221 codes. I would assume there is also some sort of sensor near the throttle body that would be related but I'm not sure if it would trigger these codes. If it would, then it's curious that I'm getting codes for two sensors that are right next to each other (the MAF and the TPS).
Any info or suggestions are appreciated. Thanks!
Former Vendor of MBWorld
Joined: Jun 2015
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1985 500SEC
Please check with a mechanic first but i have heard of the accelerator pedal causing similar problems as what your are describing. IF it ends up needing replacement we do offer those. I would need to know some more specifics on your vehicle to make sure we get you the correct part but here is one for example.
https://www.carpartsdiscount.com/cat...ml?3593=493991
Just trying to help here. If there is anything else you are needing please feel free to ask. I am here to help.
https://www.carpartsdiscount.com/cat...ml?3593=493991
Just trying to help here. If there is anything else you are needing please feel free to ask. I am here to help.
