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P0220 Powertrain

Throttle/Pedal Position Sensor/Switch "B" Circuit

A general electrical fault was detected in the secondary (B) throttle or pedal position sensor circuit. Modern drive-by-wire systems use redundant TPS tracks; the ECU compares them and flags this code on the B channel when out of range.

Affected components

  • Throttle position sensor b
  • Pedal position sensor
  • Tps wiring

Common causes

  • High likelihood: TPS B element failed
  • Medium likelihood: Wiring or connector fault

Possible symptoms

  • Check engine light on
  • Reduced throttle response, possible limp mode
  • Hesitation or surging
  • Idle too high or too low

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions
  • Reduced-power or limp mode may occur

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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