P0220 Buick Code - Throttle Position Sensor 2 Circuit
Quick Answer
The Throttle Position (TP) sensor 2 is a potentiometer type sensor with 3 circuits: A 5-volt reference circuit, a low reference circuit, and a signal circuit. Common causes include Faulty Throttle Position Sensor (TPS), Throttle Position Sensor (TPS) harness is open or shorted, Throttle Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0220 Buick indicates Throttle Position Sensor 2 Circuit.
- Common causes
- Common causes include Faulty Throttle Position Sensor (TPS), Throttle Position Sensor (TPS) harness is open or shorted, Throttle Position Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0220 Buick Description
The TP sensor is used to determine the throttle plate angle for various engine management systems. The Throttle Actuator Control (TAC) module provides the TP sensor with a 5-volt reference circuit and a low reference circuit. The TP sensor 1 signal voltage is low at closed throttle and increases as the throttle opens. When the PCM detects that the TP sensor 2 signal or TP sensor 5-volt reference voltage is outside the predetermined range, this Diagnostic Trouble Code (DTC) sets.
What are the Possible Causes of the DTC P0220 Buick?
- Faulty Throttle Position Sensor (TPS)
- Throttle Position Sensor (TPS) harness is open or shorted
- Throttle Position Sensor circuit poor electrical connection
- Fault Electric Throttle Control Actuator (or Throttle Body Motor)
- Accelerator Pedal Position Sensor (APP)
- Faulty Throttle Actuator Control (TAC) module
How to Fix the DTC P0220 Buick?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0220 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0220 Buick Code
1. What does the OBDII code P0220 mean on a Buick?
P0220 indicates a malfunction in the Throttle Position Sensor (TPS) 2 circuit, which monitors the throttle plate's position to ensure proper engine performance.
2. What are the common symptoms of code P0220 in a Buick?
Symptoms may include reduced engine power, poor acceleration, rough idling, stalling, or the activation of the check engine light.
3. What causes the P0220 code to appear on a Buick?
Common causes include a faulty Throttle Position Sensor (TPS), damaged wiring or connectors in the TPS circuit, or issues with the throttle body itself.
4. Can I drive my Buick with a P0220 code?
Driving with a P0220 code is not recommended, as it can lead to reduced engine power and unpredictable throttle response, which may compromise safety.
5. How do I diagnose a P0220 code on my Buick?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the TPS wiring and connectors, and testing the sensor with a multimeter for proper voltage and continuity.
6. How is the P0220 code fixed in a Buick?
Repairs may include replacing the Throttle Position Sensor, repairing or replacing damaged wiring, cleaning or replacing the throttle body, or reprogramming the engine control module (ECM) if necessary.
7. How much does it cost to repair a P0220 code on a Buick?
Repair costs can vary, but replacing the Throttle Position Sensor typically ranges from $100 to $300, including parts and labor.
8. Can a dirty throttle body cause a P0220 code on a Buick?
Yes, a dirty or stuck throttle body can interfere with the TPS readings and trigger the P0220 code.
9. Will resetting the check engine light clear the P0220 code on my Buick?
Resetting the light may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.
10. Can a bad ECM cause the P0220 code in a Buick?
While rare, a malfunctioning ECM can fail to process the TPS signal correctly and trigger the P0220 code.
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