P0122 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input
Quick Answer
This fault code is stored in the Engine Control Module (ECM) when a malfunction is detected in the throttle control system. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0122 Mercedes-Benz indicates Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input .
- Common causes
- Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0122 Mercedes-Benz Description
What are the Possible Causes of the DTC P0122 Mercedes-Benz?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Throttle Position Sensor (TPS)
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0122 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0122 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0122 Mercedes-Benz Code
1. What are common symptoms of OBDII code P0122 in a Mercedes-Benz?
- Common symptoms include decreased engine performance, reduced throttle response, stalling, and potential issues with the vehicle's acceleration.
2. What does the OBDII code P0122 indicate in a Mercedes-Benz?
- OBDII code P0122 indicates an issue with the Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input in the vehicle.
3. What are the possible causes of OBDII code P0122 in a Mercedes-Benz?
- Possible causes include a faulty throttle position sensor, damaged wiring or connectors related to the sensor, or issues with the vehicle's electronic control module (ECM).
4. How can I diagnose the cause of OBDII code P0122 in my Mercedes-Benz?
- Diagnosis typically involves using a diagnostic scanner to read the code, conducting a visual inspection of the sensor and its wiring, and testing the sensor's voltage with a multimeter.
5. Can driving with OBDII code P0122 cause further damage to my Mercedes-Benz?
- Continuing to drive with this code may lead to poor engine performance, decreased fuel efficiency, and potential damage to other components over time.
6. Is it safe to continue driving my Mercedes-Benz with OBDII code P0122?
- It is recommended to address the issue promptly to prevent any further damage to the vehicle and ensure optimal performance.
7. What are some repair tips for fixing OBDII code P0122 in a Mercedes-Benz?
- Repair tips include replacing the throttle position sensor, checking and repairing any damaged wiring or connectors, and resetting the ECM to clear the code.
8. Can I reset the OBDII code P0122 in my Mercedes-Benz without making any repairs?
- While you can clear the code temporarily, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.
9. How much does it typically cost to repair OBDII code P0122 in a Mercedes-Benz?
- The cost of repair can vary depending on the specific cause of the code, but it may involve around $100 to $300 for parts and labor.
10. Will OBDII code P0122 cause my Mercedes-Benz to fail an emissions test?
- Yes, having an unresolved OBDII code like P0122 can result in a failed emissions test, as it indicates an issue with the vehicle's emissions control system.
Discuss the causes and fixes for P0122 Mercedes-Benz OBDII Code
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I have a 2000 S500 that staled out on me while diving. After the car stalled I restarted the it then I hit the accelerator and the car responded. However I didn't get far may to the next block now the accelerator pedal stop responded an the car is now going no faster than 10 mph. After being check the car had a code for the accelerator pedal which was replaced. The new pedal isn't responding just like the original. The wiring harnesses are being checked. Can someone please tell what it could be?
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