P0226 Throttle/Petal Position Sensor/Switch C Circuit Malfunction

Understanding and Fixing Throttle/Petal Position Sensor/Switch C Circuit Malfunction (P0226) in Your Vehicle

If you own a modern vehicle with electronic throttle control (ETC), you may encounter various trouble codes related to the throttle or petal position sensor or switch.

One of the most common and potentially serious codes is P0226, which indicates a circuit malfunction in the C sensor or switch. In this article, we’ll explain what P0226 means, what causes it, how to diagnose it, and how to fix it. Whether you are a DIY mechanic or a professional technician, this guide will help you to understand and solve this problem.

What is P0226 and Why Does It Matter?

The P0226 code is an OBD-II generic trouble code which indicates a problem with the throttle/pedal position sensor/switch “C” circuit range/performance. This code is set when the Engine Control Module (ECM) detects an out-of-range or performance issue with the throttle/pedal position sensor circuit.

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What is Throttle/Pedal Position Sensor/Switch?


The throttle/pedal position sensor/switch is a type of vehicle sensor that monitors the position of the throttle pedal in your vehicle. This sensor plays a crucial role in how your vehicle operates, influencing factors like fuel efficiency and engine performance.


The throttle/pedal position sensor/switch sends data to your vehicle’s computer, telling it how much the throttle is open. This data helps the computer control the fuel and air mixture that goes into the engine, directly impacting your vehicle’s performance.


Without a functioning throttle/pedal position sensor/switch, your vehicle’s computer won’t know the throttle’s position. This could lead to poor fuel efficiency, reduced performance, or even engine stalling.

Causes of P0226 Code

There could be several reasons why a P0226 code might be triggered. It’s essential to understand these causes to effectively address the issue.

Mechanical Issues

These could include a faulty throttle/pedal position sensor, a damaged throttle body, or a worn-out throttle plate.

Electrical Issues

Electrical issues such as shorted or open wiring, corroded connectors, or a bad ECM could also cause a P0226 code.

Other Causes

In some cases, the problem could be due to non-mechanical or electrical issues, like a vacuum leak or even a software issue in the ECM.

Symptoms of P0226 Code

If your vehicle has a P0226 code, it may exhibit several symptoms.

Vehicle Performance Issues

These might include poor fuel efficiency, reduced power, or difficulty in acceleration.

Warning Lights

The Check Engine Light or the Service Engine Soon light may illuminate on your dashboard.

Unusual Sounds

You might hear unusual noises, like a high-pitched whine, coming from the engine compartment.

How to Diagnose P0226 Code

Using a Scan Tool

The most straightforward way to diagnose a P0226 code is by using an OBD-II scanner. This tool will read the trouble codes from the ECM and help identify the issue.

Manual Inspection

Visual inspection of the throttle body, the throttle/pedal position sensor, and their corresponding wires and connectors could also help identify any apparent issues like loose connections, frayed wires, or visible damage to the components.

Other Diagnostic Methods

In some cases, advanced diagnostic methods like voltage and resistance checks on the circuit might be required.

Steps to Fix P0226 Code

Checking the Circuit

The first step is to inspect the throttle position sensor circuit for any visible issues. This may include checking for loose or corroded connections and damaged wires.

Cleaning or Replacing the Sensor

If the circuit seems fine, the next step is to clean the throttle position sensor. If cleaning doesn’t resolve the issue, the sensor might need to be replaced.

Testing the Repair

After the repair, it’s essential to clear the P0226 code from the ECM using an OBD-II scanner and then test drive the vehicle to ensure the problem has been resolved.

Preventing P0226 Code

Regular Vehicle Maintenance

Regular maintenance, such as routine inspections and timely replacements of worn-out parts, can help prevent P0226 and other codes.

Early Problem Detection

Keeping an eye out for any early signs of trouble and addressing them promptly can also help prevent serious issues down the line.

Use of Quality Parts

Using quality replacement parts can also go a long way in preventing recurrence of issues like P0226.


Q1: Is P0226 a common code for all vehicles with ETC?
A: Not really. Some vehicles may have other codes that refer to similar issues, such as P0120, P0121, or P0122.

Q2: Can I still drive my vehicle with P0226?
A: It depends. If the symptoms are mild and do not affect your safety or vehicle performance, you may be able to drive to a mechanic or home. However, if the symptoms are severe or unpredictable, you should avoid driving and get your vehicle towed.

Q3: How much does it cost to fix P0226?
A: It varies. The cost of diagnosing and repairing P0226 may depend on the make and model of your vehicle, the location and reputation of the repair shop, the severity and complexity of the issue, and the availability and pricing of the parts and labor.

Q4: Can I fix P0226 myself?
A: It depends on your skills, tools, and experience. If you have some mechanical knowledge, electrical skills, and diagnostic equipment, you may be able to diagnose and fix P0226 yourself. However, if you are not confident or familiar with this problem, you should seek professional help.

Q5: How can I prevent P0226 from happening again?
A: You can follow some preventive maintenance and care tips, such as keeping your engine clean and dry, checking your wiring and connectors regularly, avoiding harsh driving or sudden stops, and staying up-to-date with your software updates and recalls.