P0224 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch B Circuit Intermittent

P0224 Code Definition

Throttle/pedal position sensor/switch B circuit intermittent is the technical definition of this trouble code.

What the P0224 code means

The P0224 code means that the powertrain control module (PCM) is detecting intermittent voltage readings from the throttle position sensor. This sensor should be producing a constant signal voltage to indicate to the powertrain control module the position of the butterfly valve within the throttle body.

What are the causes of the P0224 code?

• A faulty throttle position sensor
• A misaligned throttle position sensor
• A faulty powertrain control module
• Disconnected, damaged, or faulty wiring that is associated with the throttle position sensor
• A malfunction within the throttle body

What are the symptoms of the P0224 code?

• A no start or rough starting condition
• Loss of power
• Poor acceleration
• The accelerator pedal may be unresponsive
• The Check Engine Light will be illuminated

How does a mechanic diagnose the P0224 code?

A mechanic may diagnose the P0224 code by popping the hood and visually inspecting the throttle body and the throttle position sensor for anything that looks out of the ordinary. This inspection would include verifying that the throttle position sensor is plugged in and aligned correctly and making sure that the throttle body itself is functional.

If everything passes the visual inspection, the mechanic would then test the throttle position sensor for proper function using the manufacturer’s recommended procedure. If the throttle position sensor does not pass this test, the mechanic would replace the throttle position sensor at the customer’s request. If the throttle position sensor does pass the test, the mechanic would then use a high tech scan tool to test the powertrain control module for proper function if it has failed and needs to be replaced.

Common mistakes when diagnosing the P0224 code

Just like a P0222 or P0223 code, a common mistake that could be made with a P0224 code would be to replace the throttle position sensor without properly testing it. It is always best practice to use the manufacturer’s diagnostic procedure as long as it is available.

How serious is the P0224 code?

Considering that this code can cause driveability issues, I would consider this code to be serious. Most drivers would not enjoy having the loss of power symptom on their drive to work, especially if they were running late. This might persuade the driver to repair the issue sooner than later.

What repairs can fix the P0224 code?

• Replacing the throttle position sensor
• Replacing the powertrain control module
• Repairing or replacing the throttle body
• Repairing or replacing wiring that is associated with the throttle position sensor
• Realigning the throttle position sensor

Additional comments regarding the P0224 code?

It is a good idea to keep up on basic throttle body maintenance in order to help prevent a P0224 code. This would include spraying the throttle body out with throttle body cleaner and wiping it out with a clean rag. This should be done yearly or biyearly.

Need help with a P0224 code?

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