P0221 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'B' Circuit Range/Performance Problem
Quick Answer
Electric Throttle Control Actuator consists of throttle control motor, throttle position sensor (TPS), etc. Common causes include Throttle Position Sensor (TPS) harness is open or shorted, Throttle Position Sensor (TPS) circuit poor electrical connection, Faulty Throttle Position Sensor (TPS). 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
- P0221 Mercedes-Benz indicates Throttle/Pedal Position Sensor/Switch 'B' Circuit Range/Performance Problem.
- Common causes
- Common causes include Throttle Position Sensor (TPS) harness is open or shorted, Throttle Position Sensor (TPS) circuit poor electrical connection, Faulty Throttle Position Sensor (TPS).
- 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 P0221 Mercedes-Benz Description
The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output voltage, and emit the voltage signal to the Engine Control Module (ECM) In addition, these sensors detect the opening and closing speed of the throttle valve and feed the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.
What are the Possible Causes of the DTC P0221 Mercedes-Benz?
- Throttle Position Sensor (TPS) harness is open or shorted
- Throttle Position Sensor (TPS) circuit poor electrical connection
- Faulty Throttle Position Sensor (TPS)
- Fault Electric Throttle Control Actuator (or Throttle Body Motor)
- Accelerator Pedal Position Sensor (APP)
How to Fix the DTC P0221 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0221 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.
Need more information about the P0221 Mercedes-Benz code?
Need more information on how to fix the P0221 Mercedes-Benz code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0221 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0221 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0221 in a Mercedes-Benz related to the Throttle/Pedal Position Sensor/Switch 'B' Circuit Range/Performance Problem?
- Common symptoms include rough idling, reduced engine power, stalling, and difficulty accelerating.
2. What are the possible causes of OBDII code P0221 in a Mercedes-Benz?
- Potential causes include a faulty throttle position sensor, damaged wiring or connectors, a defective throttle body, or a problem with the engine control module.
3. How can I troubleshoot OBDII code P0221 in my Mercedes-Benz?
- You can start by checking the wiring and connectors for any visible damage, testing the throttle position sensor for proper operation, and scanning for any additional related trouble codes.
4. Can a dirty throttle body cause OBDII code P0221 in a Mercedes-Benz?
- Yes, a dirty or malfunctioning throttle body can disrupt the signal from the throttle position sensor and lead to the P0221 code being triggered.
5. What are some repair tips for fixing OBDII code P0221 in a Mercedes-Benz?
- Repair tips include cleaning or replacing the throttle body, checking and repairing any damaged wiring or connectors, and recalibrating the throttle position sensor.
6. Is it safe to continue driving my Mercedes-Benz with OBDII code P0221 present?
- It is not recommended to drive with the P0221 code as it can lead to poor engine performance and potential safety hazards. It's best to address the issue promptly.
7. Can I reset the OBDII code P0221 in my Mercedes-Benz by disconnecting the battery?
- Disconnecting the battery may clear the code temporarily, but it is not a recommended method to address the underlying issue causing the P0221 code.
8. How much does it typically cost to repair OBDII code P0221 in a Mercedes-Benz at a dealership?
- The cost of repair can vary depending on the specific cause of the code, but it may range from $200 to $500 or more, including parts and labor.
9. Are there any recalls or service bulletins related to OBDII code P0221 in Mercedes-Benz vehicles?
- It's advisable to check with authorized Mercedes-Benz dealerships or visit the manufacturer's website to see if there are any relevant recalls or service bulletins addressing this issue.
10. Can a DIY enthusiast with basic mechanical skills fix OBDII code P0221 in a Mercedes-Benz?
- Depending on the exact cause, a DIY enthusiast may be able to address the P0221 code by following repair guides, but it's recommended to consult a professional mechanic for accurate diagnosis and repair.
Discuss the causes and fixes for P0221 Mercedes-Benz OBDII Code
-
Mercedes CLK200 Initial problem took car for MOT. Car driven into bay engine swtiched off when technician went to switch on engine it wouldn't start Showed code P0335 crankshaft position sensor. Replaced, but still have problem. Now showing codes P0335 and P0021 at a loss as to what to do next. Any help greatly appreciated
-
hello I bought a 2003 e320 with 135000 miles.. i have since been having problems...it was running ok.. but made me think " thats it? this is what a mercedes drives like? because of very laughable performance. It had a broken ECU pin which I was able to fix then sbc problem. I bought the $ 30.00 sbc tool kit and reset it. changed the transmission conductor plate, Maf sensor, accelerator pedal position sensor, front brakes, air filter by myself to rid a poor acceleration and hard low gear shifting/ frequent limp mode... and the problem is still present. does anyone have a clue what else it could be
I currently have p0221 code for the accelerator pedal sensor and lean system banks codes.
I have had my battery voltage checked and its operating at 12..6 v (eng off) and 14+ (Eng on)
I already spent close to the price of a honda accord and feel very bad that thig thing is still diving into my wallet
PLEASE HELP!!!
Thanks in advance
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
