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Engine-Codes – Generic – P2622

P2622 Code - Throttle Position Output Circuit High

Quick Answer

The P2622 diagnostic trouble code (DTC) relates to the Throttle Position Output Circuit High. Common causes include Faulty throttle position sensor: A malfunctioning TPS can send incorrect voltage signals to the ECM, triggering the P2622 code, Wiring issues: Damaged or corroded wiring connected to the TPS can cause high voltage readings, ECM malfunction: A faulty ECM can misinterpret the TPS signals, leading to the code being set. 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
P2622 indicates Throttle Position Output Circuit High.
Common causes
Common causes include Faulty throttle position sensor: A malfunctioning TPS can send incorrect voltage signals to the ECM, triggering the P2622 code, Wiring issues: Damaged or corroded wiring connected to the TPS can cause high voltage readings, ECM malfunction: A faulty ECM can misinterpret the TPS signals, leading to the code being set.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2622 Description

The P2622 diagnostic trouble code (DTC) relates to the Throttle Position Output Circuit High. This code is set when the Engine Control Module (ECM) detects that the voltage signal from the throttle position sensor (TPS) is higher than expected. The TPS is a sensor that monitors the position of the throttle valve in the engine, allowing the ECM to adjust the air-fuel mixture for optimal performance. When the TPS output voltage is too high, it can lead to erratic engine performance, poor fuel economy, and potentially cause the vehicle to stall.

OBDII Code P2622 - Throttle Position Output Circuit High
P2622 Code - Throttle Position Output Circuit High

Common Causes of P2622

  1. Faulty throttle position sensor: A malfunctioning TPS can send incorrect voltage signals to the ECM, triggering the P2622 code.
  2. Wiring issues: Damaged or corroded wiring connected to the TPS can cause high voltage readings.
  3. ECM malfunction: A faulty ECM can misinterpret the TPS signals, leading to the code being set.
  4. Throttle body issues: A dirty or faulty throttle body can affect the TPS readings and trigger the code.
  5. Poor electrical connection: Loose or poor electrical connections between the TPS and ECM can cause high voltage readings.

Symptoms of P2622

  1. Rough idle: The engine may idle erratically or stall due to incorrect throttle position readings.
  2. Reduced power and acceleration: The vehicle may struggle to accelerate smoothly or have decreased power output.
  3. Poor fuel economy: The engine may consume more fuel than usual due to incorrect throttle adjustments.
  4. Check Engine Light: The illumination of the Check Engine Light on the dashboard is a common symptom associated with this code.

How to Fix P2622

  1. Diagnose the issue: Use a scan tool to retrieve the DTC and check the TPS voltage readings to confirm the problem.
  2. Inspect wiring and connections: Check the wiring harness connected to the TPS for any damage or corrosion and repair or replace as needed.
  3. Replace the throttle position sensor: If the TPS is faulty, replace it with a new one following the manufacturer's recommendations.
  4. Clear the DTC: Clear the code using a scan tool after completing the repair to reset the ECM and monitor the system for any recurring issues.
  5. Test drive: Take the vehicle for a test drive to ensure that the symptoms associated with the P2622 code have been resolved.

Cost to Fix P2622

The typical repair costs for addressing the P2622 code can vary depending on the specific cause of the issue. In general, replacing a faulty throttle position sensor can cost between $50 to $200, while addressing wiring issues or ECM problems may incur additional labor costs. On average, the total repair cost for this issue can range from $100 to $500, including parts and labor. It's essential to consider the hourly labor rates at auto repair shops, which can impact the final cost of the repair. Check with local shops for more accurate estimates based on your vehicle's make and model.

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Code P2622 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2622 Code

1. What is OBDII code P2622?

Code P2622 indicates a problem in the throttle position output circuit, specifically that the signal is higher than expected. This could be due to electrical issues like short circuits or faults in the throttle position sensor or its wiring.

2. What symptoms might I notice if my vehicle has code P2622?

Symptoms can include erratic engine behavior, poor acceleration, engine stalling, and an illuminated check engine light. The vehicle may also enter a limp mode to protect the engine from potential damage.

3. What could cause the P2622 code to appear?

Potential causes include faulty throttle position sensors, damaged wires or connectors in the throttle position sensor circuit, or issues with the engine control module (ECM) itself.

4. How can I fix the OBDII code P2622?

Repairs might include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, or in some cases, reprogramming or replacing the ECM.

5. Is it safe to drive with the P2622 code?

Driving with this code is not advised as it can lead to reduced vehicle performance and potentially dangerous driving conditions, especially if the engine behavior is unpredictable.

6. How is the P2622 code diagnosed?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the throttle position sensor and its connections, and using a multimeter to check for high voltage in the throttle position output circuit.

7. Can the P2622 code affect the fuel economy of my vehicle?

Yes, the P2622 code can affect fuel economy. Erratic throttle position readings can lead to improper air-fuel mixture adjustments by the ECM, causing the engine to run inefficiently.

8. What tools are needed to confirm a diagnosis of the P2622 code?

Tools required may include an OBDII scanner to read the code and live data, a multimeter for electrical tests, and possibly a scope to check the detailed operation of the throttle position sensor.

9. How often does the P2622 code occur in vehicles?

The frequency of code P2622 appearing is not particularly high but can occur in vehicles with aging or damaged throttle position sensors or where there is exposure to harsh conditions that could damage electrical components.

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