p0221 throttle pedal position sensor switch b circuit range performance problem

P0221 Throttle Pedal Position Sensor Switch B Circuit Range Performance Problem

OBD2 Code: P0221
Description: Throttle Pedal Position Sensor/Switch B Circuit Range/Performance Problem
Definition: This code indicates that the Engine Control Module (ECM) has detected a problem with the range or performance of the throttle pedal position sensor/switch “B” circuit.

P0221 – Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem

Severity: Moderate

Common Causes

Common causes of P0221:

Common Misdiagnosis

OBD2 Code: P0221

Description: Throttle Pedal Position Sensor/Switch B Circuit Range/Performance Problem

Common Misdiagnosis: Replacing the throttle body or throttle position sensor without verifying wiring issues or connector problems.

Common Diagnostic Steps

OBD2 Code: P0221

Description: Throttle Pedal Position Sensor/Switch B Circuit Range/Performance Problem

Check for any additional trouble codes that may be present, as they can provide more context or related issues.
Inspect the throttle pedal position sensor and its wiring for signs of damage, corrosion, or disconnection.
Test the voltage and ground signals at the throttle pedal position sensor using a multimeter to ensure they are within manufacturer specifications.
Verify the integrity of the connections and terminals in the circuit; clean or repair as necessary.
Use an OBD2 scanner to monitor live data from the throttle pedal position sensor to check for irregularities in readings.
If applicable, perform a throttle body relearn procedure to reset adaptive values in the vehicle’s ECU.
If all checks pass but the code persists, consider replacing the throttle pedal position sensor with a new one from a reputable source.