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P0223Throttle/Pedal Position Sensor/Switch "B" Circuit High

What it means

The throttle or pedal position sensor signal voltage is higher than the sensor can normally produce (close to 5 V). Most often the signal wire or the sensor ground is open, or the signal is shorted to a supply voltage.

Symptoms

  • Limp mode with very limited power
  • Hesitation, surging or erratic idle
  • Electronic throttle warning light

Common causes

  • Open signal wire (the ECU's pull-up then reads high)
  • Open or high-resistance sensor ground
  • Signal shorted to the 5 V reference or to battery voltage
  • Failed throttle or pedal position sensor

What to check first

  1. Measure the voltage drop on the sensor ground with the key on (should be under 0.1 V)
  2. Unplug the sensor: the live data should jump to the opposite extreme
  3. Inspect the harness for chafing against other wires or hot parts
Can I drive with P0223? Not recommended. P0223 can lead to stalling, limp mode or engine damage; diagnose it before driving further.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

How to test the parts behind P0223

Throttle and accelerator pedal position sensorsWiring, typical values, multimeter and scope tests

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P0223: questions and answers

What does P0223 mean?

P0223: Throttle/Pedal Position Sensor/Switch "B" Circuit High. The throttle or pedal position sensor signal voltage is higher than the sensor can normally produce (close to 5 V). Most often the signal wire or the sensor ground is open, or the signal is shorted to a supply voltage.

What are the symptoms of P0223?

Limp mode with very limited power. Hesitation, surging or erratic idle. Electronic throttle warning light.

What causes P0223?

Open signal wire (the ECU's pull-up then reads high). Open or high-resistance sensor ground. Signal shorted to the 5 V reference or to battery voltage. Failed throttle or pedal position sensor.

How do you diagnose P0223?

1. Measure the voltage drop on the sensor ground with the key on (should be under 0.1 V) 2. Unplug the sensor: the live data should jump to the opposite extreme 3. Inspect the harness for chafing against other wires or hot parts

Can I drive with P0223?

Not recommended. P0223 can lead to stalling, limp mode or engine damage; diagnose it before driving further.