P0220: Throttle/Pedal Position Sensor B Circuit Malfunction

P0220: Throttle/Pedal Position Sensor B Circuit Malfunction

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P0220: Throttle/Pedal Position Sensor B Circuit Malfunction – A Common Misstep

Look - if you're seeing the P0220 code, it's telling you that there's a problem with the throttle/pedal position sensor B circuit. This sensor plays a crucial role in how your vehicle's engine responds to your acceleration input. If something's off, you might experience performance issues, or worse, your vehicle could enter limp mode. The key is knowing what you're dealing with before throwing parts at it.

Listen - this isn't just about swapping sensors without understanding the underlying issue. The throttle position sensors (TPS) are essential for proper fuel management and engine performance. When the circuit malfunctions, it can lead to erratic engine behavior and potential safety risks. Let’s get to the symptoms and diagnostics so you can tackle this head-on.

Symptoms

  • Check Engine Light illuminated
  • Unresponsive acceleration or stalling
  • Erratic engine performance or rough idling
  • Increased fuel consumption
  • Vehicle entering limp mode
  • Difficulty maintaining a steady speed
  • Acceleration feels "off" or delayed
  • Inconsistent throttle response

Diagnostic order

  1. Inspect the wiring and connectors of the throttle position sensor for damage or corrosion.
  2. Check the TPS resistance with a multimeter – it should typically be between 0.5 to 4.5 volts at idle.
  3. Test for proper voltage supply to the sensor; it should be around 5 volts.
  4. Examine the ECM for any stored codes or related issues that could affect the TPS circuit.
  5. Replace the throttle position sensor if the above checks out but still no improvement.

Common questions

  • What causes a P0220 code?

    This code typically arises from a faulty throttle position sensor, damaged wiring, or a bad connector.

  • Can I drive with a P0220 code?

    Not recommended. Driving can lead to poor performance and safety issues.

  • How much does it cost to fix a P0220 code?

    Depending on the issue, repairs can range from $100 to $450, including parts and labor.

  • Is the throttle position sensor the same as the accelerator pedal position sensor?

    No, they are different sensors but both are vital for proper throttle control.

  • Can a dirty throttle body trigger a P0220 code?

    Yes, a dirty throttle body can affect sensor readings, leading to the code.

  • Will a faulty TPS affect my fuel economy?

    Absolutely. An improper TPS reading can lead to excessive fuel consumption.

  • How can I test the throttle position sensor?

    Use a multimeter to check resistance and voltage at the sensor’s terminals.

  • What other codes might appear alongside P0220?

    Look for codes like P0120 or P2135, which relate to throttle position issues.

Vehicle-specific notes

  • Ford EcoBoost engines (1.5/2.0/2.3/3.5L) often have wiring issues due to heat exposure.
  • Honda K-series 2.0/2.4 may exhibit erratic throttle response, particularly if the sensor is dirty.
  • Toyota 2GR-FE V6 commonly experiences TPS failure after high mileage, around 150,000 miles.
  • GM 2.4 Ecotec engines frequently have connector problems and should be inspected regularly.
  • Chrysler 3.6 Pentastar engines can throw this code if the throttle body is gummed up.
  • BMW N20/N54/N55 platforms have a complex throttle control setup, making diagnostics tricky.
  • Subaru EJ20/FA20 engines may show this code after modifications that affect airflow.
  • Nissan VQ35/VK56 engines can face wiring harness issues due to poor routing, leading to shorts.

Parts and cost ranges

  • Throttle Position Sensor: $50 - $150
  • Throttle Body Cleaning Kit: $10 - $30
  • Wiring Harness Repair Kit: $20 - $50
  • Labor Costs: $75 - $200 depending on the shop rate

What people get wrong

  • Assuming the throttle position sensor is the only issue without checking wiring.
  • Ignoring symptoms and waiting too long to diagnose, leading to further damage.
  • Replacing the sensor without cleaning the throttle body first.
  • Not using a multimeter for accurate voltage and resistance readings.

Related codes

For further issues related to throttle position sensors, check out P0210 and P0122 for a better understanding of potential complications.

Stop throwing parts at your car. The Mobile Master Mechanic app walks you through the exact diagnostic for YOUR specific VIN - engine, year, trim, even mileage-specific known issues. Free download.

-- Hank, Master Mechanic at Mobile Master Mechanic

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