Engine

P0220 — Throttle/Pedal Position Sensor "B" Circuit Malfunction

Severity: medium Drive with care, to a shop

What P0220 means

The engine control module constantly monitors the signal voltage from the throttle position or accelerator pedal position sensor (circuit B). The sensor normally outputs a smoothly changing voltage within a set range and must agree with its companion channel. P0220 sets when that signal goes out of range, drops out, or doesn't match what the PCM expects.

Symptoms

  • Check Engine light on
  • Poor or erratic throttle response
  • Hesitation or stumbling when accelerating
  • Reduced power or limp mode
  • Unstable or high idle
  • Hard starting or stalling in some cases

Possible causes

  1. Failed throttle position sensor (TPS)
  2. Failed accelerator pedal position (APP) sensor
  3. Damaged wiring: open, short to ground or to power
  4. Corroded or loose sensor connector
  5. Carbon buildup or sticking at the throttle body
  6. Problem with the 5-volt reference supply to the sensors
  7. Rarely, a faulty PCM or software issue

How to diagnose

  1. Scan for all codes and review freeze-frame data; look for related throttle or pedal codes (P0120, P2135, etc.).
  2. Inspect the throttle and pedal sensor connectors and harness for chafing, corrosion, moisture and poor latching.
  3. With a scan tool, watch live sensor A and B signals while pressing the pedal slowly; they should move smoothly without dropouts or jumps.
  4. Use a multimeter to check the 5V reference, ground and signal wire at the sensor connector against the factory wiring diagram.
  5. Test the wiring between the sensor and PCM for opens and shorts, wiggling the harness while monitoring.
  6. Inspect the throttle plate for carbon buildup, sticking or binding; remove the throttle body if needed.
  7. If wiring and supply are good, replace the suspect sensor and perform a throttle relearn.
  8. Consider the PCM last, only after everything else is ruled out.

Common fixes

  • Repair or replace damaged wiring and connectors
  • Replace the throttle position sensor or the throttle body assembly
  • Replace the accelerator pedal position sensor
  • Clean the throttle body and run a throttle relearn with a scan tool
  • Update software or replace the PCM (rare)

P0220 on different brands

Ford · manuals
Ford documents an extended code P0220:16 for its 2024–2025 gasoline engines, meaning TP B circuit continuity (circuit voltage below threshold); it describes the condition the monitor detected, not a confirmed failed part.

Questions and answers

What does P0220 mean?

It means the PCM sees an out-of-range signal from throttle or pedal position sensor circuit B. The cause can be the sensor itself, wiring, a connector, or a dirty throttle body.

Can I drive with a P0220 code?

Only briefly and with care, on the way to a shop. The engine may go into limp mode and lose power at a bad moment, which is risky in traffic.

Will cleaning the throttle body fix P0220?

Sometimes, if carbon buildup or sticking is the cause. If the fault is in the sensor or wiring, cleaning won't help, so check the electrical side first.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.