P0202 Fault Code

P0202 OBD-II Trouble Code Short Description

Cylinder 2 Injector Circuit Malfunction

What does trouble code P0202 mean?

The P0202 fault code is related to the fuel injection system in a car. It indicates that there is a problem with the circuit of the fuel injector 2 in cylinder 2. This code is often triggered by a malfunction in the wiring or electrical components of the fuel injector.

The most common solution to fix P0202 fault code is to replace the faulty injector or the related electrical components. However, before taking any action, it is necessary to perform a thorough diagnosis to identify the root cause of the problem. This can be done by inspecting the wiring, connectors, and related components and testing them for continuity and voltage.

Ignoring the P0202 fault code can lead to significant problems, such as reduced engine performance, poor fuel economy, and potential engine damage. Therefore, it is crucial to address this issue as soon as possible to avoid any further complications.


What are the symptoms of the P0202 code?

  • Check Engine Light (CEL) will turn on and stay on
  • The engine may misfire or run roughly
  • The fuel efficiency of the vehicle may decrease
  • The acceleration may be sluggish or slow
  • The vehicle may stall or have difficulty starting
  • There may be fuel odors or leaks under the hood or near the fuel injectors

It's important to note that while these symptoms are common for a P0202 fault code, they may also be indicative of other issues with the engine or fuel system. It's best to have a trained mechanic diagnose and repair the issue to ensure the problem is fixed correctly.


What causes the P0202 code?

Possible reasons for P0202 fault code on cars include:

  1. Faulty Injector - The fuel injector on cylinder 2 may be malfunctioning and not delivering the correct amount of fuel to the engine, leading to misfire and triggering the P0202 code.

  2. Wiring Issues - The wiring and connectors that connect the fuel injector to the engine control module (ECM) may be damaged, corroded, or disconnected, causing a short circuit or open circuit, which can affect the injector's performance and trigger the P0202 code.

  3. Fuel System Problems - Low fuel pressure, clogged fuel filter, or a faulty fuel pump can cause a lean or rich fuel mixture, which can result in misfire and trigger the P0202 code.

  4. ECM Failure - If the engine control module (ECM) responsible for controlling the fuel injection system malfunctions or fails, it can cause various engine performance problems, including misfire and P0202 code.

  5. Mechanical Problems - Valve timing issues, compression problems, or a malfunctioning ignition system can also lead to misfire and trigger the P0202 code.

It is recommended to have a professional mechanic diagnose the root cause of the P0202 code to prevent further damage to the engine and ensure proper vehicle functioning.

Possible Solutions

How to fix P0202?

Possible ways to fix a P0202 fault code on cars include:

  1. Check the fuel injector: The P0202 code indicates a problem with the fuel injector circuit. Check the wiring, connectors, and resistance of the injector. If the injector is faulty, replace it.

  2. Inspect the fuel system: Check the fuel pressure, fuel pump, fuel lines, and fuel filter for any issues. If there are any leaks, clogs, or low pressure, address them accordingly.

  3. Check the engine control module (ECM): The ECM controls the fuel injector circuit, so if there is an issue with the ECM, it could trigger the P0202 code. Check the ECM for any malfunction and repair or replace it if necessary.

  4. Address other engine problems: Other engine issues, such as misfires, can also cause the P0202 code to appear. Check the spark plugs, ignition system, and other engine components for any problems and fix them accordingly.

  5. Reset the code: After fixing the underlying issue, use an OBD-II scanner to reset the code and see if it reappears. If it doesn't, the problem has been resolved. If it does, there may be another issue that needs to be addressed.