EngineModerate⚠️ Professional Recommended

P0220

Q: What does OBD2 code P0220 mean?

P0220 means: Throttle/Pedal Position Sensor/Switch B Circuit Malfunction. The secondary throttle position sensor (Sensor B), used for redundancy in electronic throttle systems, has a circuit fault.

Throttle/Pedal Position Sensor/Switch B Circuit Malfunction

The secondary throttle position sensor (Sensor B), used for redundancy in electronic throttle systems, has a circuit fault.

SeverityModerate

CategoryEngine

Est. Repair Cost$200-$500

Code TypePowertrain

DIY RepairProfessional

⚡ Common Causes

›Faulty throttle body assembly
›Damaged wiring
›Corroded connector

⚠️ Symptoms

›Check engine light
›Possible limp mode
›Rough idle or hesitation

✅ How to Fix — Step by Step

Step 1:Inspect throttle body connector and wiring
Step 2:Test sensor B signal with scan tool
Step 3:Replace throttle body if sensor has failed

🔧 Diagnostic Tools Required

✔OBD-II Diagnostic Scanner
✔Digital Multimeter
✔Fuel Pressure Gauge
✔Compression Tester
✔Spark Tester

Using the correct diagnostic tools helps identify the root cause of P0220 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: On drive-by-wire systems, Sensor A and B must agree with each other - a mismatch commonly triggers limp mode as a safety measure.

Frequently Asked Questions

What does OBD2 code P0220 mean?+

P0220 stands for Throttle/Pedal Position Sensor/Switch B Circuit Malfunction. The secondary throttle position sensor (Sensor B), used for redundancy in electronic throttle systems, has a circuit fault.

What causes code P0220?+

Faulty throttle body assembly; Damaged wiring; Corroded connector

How do I fix code P0220?+

Inspect throttle body connector and wiring; Test sensor B signal with scan tool; Replace throttle body if sensor has failed

How much does it cost to fix P0220?+

Estimated repair cost for P0220 is $200-$500.

Is P0220 DIY-friendly?+

P0220 typically requires professional equipment and a qualified mechanic.