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P0228 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.


The throttle/pedal position sensor/switch “C” circuit may have a problem, according to the P0228 Diagnostic Trouble Code (DTC), an OBD-II (On-Board Diagnostics II) code. It specifically indicates an issue with an excessive throttle position sensor (TPS) circuit signal.


When your vehicle’s onboard computer detects that the throttle position sensor/switch “C” circuit signal is consistently higher than the expected range, it triggers the P0228 code. The engine’s performance and reliability may be interrupted by this deviation in the signal.


There are various things that might cause the P0228 code to appear, including:

  • Faulty Throttle Position Sensor (TPS): A malfunctioning TPS that provides consistently high signals to the engine control module (ECM) can cause the P0228 code.
  • Damaged Wiring or Connectors: The TPS circuit might have damaged wiring, loose connections, or corroded terminals, causing a strong signal to be transmitted.
  • Throttle Body Issues: The code may be set off by issues with the throttle body, such as a broken throttle plate or a jammed throttle position sensor.
  • ECM Issues: In a few uncommon circumstances, the engine control module may be broken, misinterpreting the TPS signals, and resulting in the P0228 code.


The following symptoms might appear in drivers who have the P0228 code:

  • Check Engine Light: The most noticeable symptom is the illumination of the Check Engine Light on the vehicle’s dashboard.
  • Decreased Engine Performance: The engine’s response to throttle inputs may be slow, which causes poor acceleration and diminished power.
  • Problems with engine idling: The engine may idle harshly or erratically.
  • Unresponsive Throttle: The throttle may stop working or respond slowly, making it difficult to regulate the speed of the vehicle.


The P0228 code must be correctly diagnosed by taking the following actions:

  • OBD-II Scanner: To get the precise fault code recorded in the ECM, a certified mechanic will utilize an OBD-II scanner.
  • Visual Inspection: The throttle position sensor and its wiring will be visually inspected by the technician to look for any obvious problems, including frayed wires or loose connections.
  • TPS Testing: The TPS will be checked with a digital multimeter for correct voltage and signal output to see whether it consistently outputs high voltage.
  • Throttle Body Examination: The throttle body will be checked for any mechanical problems, like a jammed throttle plate, that can impair TPS performance.
  • ECM Testing: The ECM may occasionally need to be tested to make sure it is operating properly and isn’t the source of the code.

Common mistakes

Some frequent errors made while diagnosing and fixing the P0228 code are as follows:

  • Ignoring Wiring Problems: Ignoring any wiring difficulties might result in problems that never get fixed.
  • Ignoring Throttle Body Inspection: Technicians may concentrate entirely on the TPS without looking for any throttle body issues, leading to insufficient repairs.
  • Skipping TPS Testing: If the TPS is not tested and it is assumed to be defective, it may be essential to replace the item.

How serious is this?

Due to the possibility of compromising engine performance and hazardous road conditions, the P0228 code should not be ignored. While the vehicle may not yet be usable, an immediate solution is required in order to avoid any additional damage and potential safety risks.

What repairs can fix the code?

repair manuals

The following fixes can remove the P0228 error code in accordance with the diagnosis:

  • Throttle Position Sensor Replacement: If the TPS is faulty and sending signals consistently higher than the expected range, it should be replaced with a new, functioning unit.
  • Repairing or Cleaning Wiring/Connectors: To guarantee effective signal transmission, any broken wiring or loose connections should be fixed or cleaned.
  • Throttle Body Repair or Replacement: In order to restore correct TPS operation, the throttle body may need to be fixed or replaced if it is faulty.
  • ECM Replacement: In extremely rare circumstances when the ECM is the problem, it will need to be replaced or reprogrammed.

Related codes

Other related codes that might be associated with P0228 include P0220, P0221, P0222, P0223, and P0227, which all pertain to issues with the throttle position sensor and its circuitry.


A significant failure of a vehicle’s performance and drivability may result from the P0228 DTC code. It is important to consult with your vehicle’s mechanic as soon as you notice a check engine light or any of these symptoms so that they can identify and solve the problem without delay. 

Failure to comply with the code or delay in fixing it may result in more serious problems and potentially expensive repairs later on. In order to ensure a smooth and safe operation of the vehicle on the roads, it is important that you pay attention to the P0228 code as soon as possible.

P0228 Code – What Does It Mean & How To Fix It