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P0220 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


DTCs, such as P2420, are alphanumeric codes that appear on the vehicle’s OBD systems to indicate certain engine problems and their associated components. P0220 is specifically associated with the Throttle/Pedal Position Sensor/Switch “B” Circuit.


When the engine control module (ECM) detects a malfunction or abnormality in the Throttle/Pedal Position Sensor/Switch “B” Circuit, it triggers the P0220 code. That means that the sensing device or switches that control the position of the brake and accelerator are having problems.


The P0220 code may be activated for a variety of reasons, such as:

  • Throttle Position Sensor Error: A throttle position sensor error can cause the ECM to receive erroneous data, which results in a code.
  • Wire or Connector Problems: The throttle position sensor’s wire, connectors, or harnesses might malfunction due to damage or corrosion.
  • Throttle/Pedal Position Sensor Alignment: Misaligned sensors may produce inconsistent readings and set off the code.
  • Engine Control Module Malfunction: On occasion, an engine control module might interpret sensor data erroneously and set off the code.


When the P0220 code is triggered, you may notice the following symptoms:

  • Illuminated Check Engine Light: The most noticeable sign of a problem with the throttle or pedal position sensor circuit is the illumination of the check engine light on the dashboard.
  • Decreased Engine Performance: In order to stop more damage, the ECM could switch to failsafe mode, which reduces the engine’s power and responsiveness.
  • Poor Acceleration: Due to erroneous sensor data, acceleration may become slow and less responsive.


To diagnose the P0220 code accurately, a qualified mechanic will perform the following steps:

  • OBD-II Scanner: Using a diagnostic scanner, the technician will retrieve the stored trouble codes and freeze frame data for analysis.
  • Inspection of the Throttle Position Sensor: The throttle position sensor and associated parts will be examined for any obvious blemishes or misalignments.
  • Wire and Connector Check: The throttle position sensor’s wire and connections will be checked for damage or corrosion.
  • Testing of the Throttle/Pedal Position Sensor: The throttle or pedal position sensor will be examined to make sure it is giving the ECM accurate information.

Common mistakes

The following frequent errors should be avoided while working with the P0220 code:

  • Ignoring the Code: Ignoring the P0220 error code and delaying fixing the underlying problem may result in more serious engine issues.
  • Replacing Components Without a Good Diagnosis: Replacing components without a good diagnosis might result in time and money being wasted while the problem remains unresolved.

How serious is this?

The code P0220 indicates a problem with the throttle or pedal position sensor system, which can result in low engine performance and slow acceleration. It is essential to resolve this issue swiftly so that the possible complications are avoided, even if they do not lead directly to a breakdown.

What repairs can fix the code?

repair manuals

It might be essential to make the following repairs to fix the P0220 error code:

  • Replacement of the Throttle/Pedal Position Sensor: If the throttle or pedal position sensor is broken, a brand-new, functional device should be installed in its stead.
  • Repairing the wiring or connections: If the wire or connectors have problems, they should be fixed or replaced as necessary.
  • Throttle/Pedal Position Sensor Alignment: Ensuring proper sensor alignment can prevent future circuit malfunctions.
  • Engine Control Module Replacement: The engine control module may need to be replaced in rare instances of ECM malfunction.

Related codes

Codes that may be related to P0220 include:

  • P0120 – Throttle/Pedal Position Sensor/Switch “A” Circuit
  • P0121 – Throttle/Pedal Position Sensor/Switch “A” Circuit Range/Performance Problem


The DTC Code P0220 indicates that the circuit for the Throttle and Pedal Position sensors may be malfunctioning, which could lead to a decrease in engine performance. In order to keep the engine healthy and provide a comfortable driving experience, a timely diagnosis, and appropriate repairs are required.

Seek professional advice to deal with the problem immediately and effectively if you have encountered the P0220 code or symptoms. Failure to address these issues could result in additional problems, compromising your vehicle’s total performance.

P0220 Code – What Does It Mean & How To Fix It