P0221 Code Definition
Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance problem
What the P0221 code means
This code means that the voltage or resistance in the circuitry of the throttle position sensor has fallen out of the acceptable range specified by the manufacturer.
What are the causes of the P0221 code?
A faulty throttle position sensor Damaged or loose wiring associated with the throttle position sensor Throttle body malfunction A faulty powertrain control module A misaligned throttle position sensor
What are the symptoms of the P0221 code?
Engine does not start Engine runs rough Hesitation or stumble Loss of power or poor acceleration
How does a mechanic diagnose the P0221 code?
Inspects the throttle body for any obvious damages.
Plugs in or repairs any electrical connectors that are unplugged or damaged
Ensures that the throttle position sensor is installed correctly
Tests the sensor using the manufacturer’s recommendations
If no problems are found with the throttle body position sensor, it is possible that the Engine Control Module (ECM) may have an issue.
Common mistakes when diagnosing the P0221 code
Replacing the throttle position sensor without testing it.
Many people think that just because a part is mentioned in a trouble code definition, it means that the part must be causing the problem. This can oftentimes lead to a misdiagnosis and wasted time and money.
How serious is the P0221 code?
The P0221 code is moderately serious, as it can cause several driveability problems and the engine will not perform correctly. The symptoms could cause longer drive times to work which can be very bothersome to the vehicle owner. Have this issue corrected quickly in order to get the vehicle to perform as it should again.
What repairs can fix the P0221 code?
- Replacing the throttle position sensor
- Plugging an electrical connector back in
- Repairing wiring associated with the throttle position sensor
- Replacing the Engine Control Module
Additional comments regarding the P0221 code?
Just like with any other Check Engine Light code, it is best to get the problem diagnosed and repaired as soon as possible in order to prevent further engine or vehicle damage.
Need help with a P0221 code?
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.