The P2622: Throttle Position Output Circuit High code indicates that there is a higher than expected voltage supply to the throttle position sensor (TPS). This issue could prevent the sensor from accurately communicating the position of the throttle to the engine control module (ECM), potentially leading to erratic engine behavior, poor throttle response, or increased fuel consumption.
P2622 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2622: Throttle Position Output Circuit High |
| Is it serious? | Yes, as high voltage in the throttle position sensor circuit can lead to incorrect throttle readings, causing poor engine performance and unexpected acceleration or deceleration. |
| Possible causes | – High voltage supply to the throttle position sensor – Faulty throttle position sensor – Wiring or connector issues |
| How to diagnose? | – Measure voltage in the throttle position output circuit – Inspect the throttle position sensor – Check wiring and connectors for shorts or damage – Replace faulty components if necessary |
P2622 Meaning
The P2622: Throttle Position Output Circuit High code means that the voltage signal from the throttle position sensor (TPS) is higher than expected. The TPS monitors the position of the throttle valve and provides crucial information to the ECM for managing the air-fuel mixture and timing. A high voltage signal might indicate a fault in the sensor itself, a short circuit, or wiring issues, leading to incorrect throttle positioning, unpredictable acceleration, and poor engine performance.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to identify if there are any other related codes present. Addressing additional codes may help provide further insights into the issue. | OBD-II Scanner |
| Measure Voltage in Throttle Position Circuit | Use a multimeter to measure the voltage in the throttle position sensor circuit. Compare the voltage reading with manufacturer specifications to determine if the voltage is above acceptable limits. | Multimeter, Diagnostic Tool |
| Inspect Throttle Position Sensor | Visually inspect the throttle position sensor for signs of physical damage, overheating, or improper installation. Confirm that the sensor is securely mounted and functioning properly. | Flashlight, Safety Gloves |
| Check Wiring and Connectors | Inspect all wiring and connectors leading to and from the TPS for any signs of damage, such as frayed wires, corrosion, or shorts. Repair or replace any damaged sections as necessary. | Flashlight, Multimeter |
| Test Throttle Position Sensor Function | Use a diagnostic tool to monitor the throttle position sensor’s output as you move the throttle. Ensure that the output changes smoothly and remains within the proper voltage range. | Diagnostic Tool |
| Replace Faulty Components | If any faulty components, such as the throttle position sensor or wiring, are identified, replace them with parts that meet the manufacturer’s specifications. | Replacement Parts |
| Clear the Code and Test Drive | Clear the P2622 code using an OBD-II scanner after completing the repairs. Start the engine and take the vehicle for a test drive to verify proper throttle response and confirm that the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle to ensure that the P2622 code has been successfully cleared. If the code reappears, further diagnostics may be necessary to locate and address the underlying issue. | OBD-II Scanner |
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