Throttle position sensor problems

Asked by Mar 12, 2013 at 08:09 PM about the 2003 Mercedes-Benz C-Class C 240 Sedan

Question type: Maintenance & Repair

2003 mercedes c240 owner here, I'm  receiving the error code P0123 for the throttle position sensor. Symptoms are
little to no acceleration periodically, and the problem vanishes with a restart of the engine. And I'm now looking for
possible solutions; should the entire accelerator pedal assembly be replaced or just the sensor? Thanks
Also if you have instructions on pedal removal that would be helpful.

2 Answers

96,125

If you replace anything, just replace the sensor. If the sensor was bad, wouldn't it be bad all the time? Maybe it's something else.

2 out of 2 people think this is helpful.
96,125

Possible causes - Faulty throttle position sensor - Throttle position sensor harness is open or shorted - Throttle position sensor circuit poor electrical connection --- The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

6 out of 6 people think this is helpful.
Best Answer

Your Answer

Add photo

Related Questions

Search Mercedes-Benz C-Class Questions

Mercedes-Benz C-Class Experts

#1 Lorne Grandison
Lorne Grandison
Reputation 4,690
#2 PPC123
PPC123
Reputation 3,250
#3 dandyoun
dandyoun
Reputation 2,380
View All

Related Models For Sale

Used Mercedes-Benz E-Class
377 Great Deals out of 21,626 listings starting at $699
Used BMW 3 Series
943 Great Deals out of 33,257 listings starting at $1,000
Used Mercedes-Benz S-Class
133 Great Deals out of 6,531 listings starting at $1,200
Used BMW 5 Series
487 Great Deals out of 15,051 listings starting at $2,499
Used Audi A4
190 Great Deals out of 10,723 listings starting at $700
Used BMW M3
38 Great Deals out of 1,711 listings starting at $4,544
Used Mercedes-Benz CL-Class
24 Great Deals out of 582 listings starting at $3,700
Used Mercedes-Benz M-Class
165 Great Deals out of 5,070 listings starting at $2,980
Used Ford Mustang
365 Great Deals out of 46,760 listings starting at $1,500
Used Chevrolet Camaro
152 Great Deals out of 32,722 listings starting at $1,995
Used Mercedes-Benz CLK-Class
35 Great Deals out of 1,345 listings starting at $2,000
Used Honda Accord
717 Great Deals out of 86,701 listings starting at $1,250

Used Cars For Sale

2017 Mercedes-Benz C-Class For Sale
13 Great Deals out of 13,749 listings starting at $33,998
2016 Mercedes-Benz C-Class For Sale
91 Great Deals out of 2,402 listings starting at $25,500
2015 Mercedes-Benz C-Class For Sale
28 Great Deals out of 1,209 listings starting at $20,921
2014 Mercedes-Benz C-Class For Sale
63 Great Deals out of 2,747 listings starting at $13,980
2013 Mercedes-Benz C-Class For Sale
73 Great Deals out of 1,936 listings starting at $12,895