The P2620: Throttle Position Output Circuit/Open code indicates that there is an open circuit or disconnection in the throttle position output circuit. The throttle position sensor (TPS) provides essential feedback to the engine control module (ECM) regarding the position of the throttle, which controls air intake into the engine. An open circuit means that the ECM cannot accurately detect the throttle position, leading to performance issues.
P2620 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2620: Throttle Position Output Circuit/Open |
| Is it serious? | Yes, as it impacts the ability to control engine performance, which may lead to poor throttle response, stalling, or reduced engine efficiency. |
| Possible causes | – Open circuit or disconnected wiring – Faulty throttle position sensor – Broken or loose connector |
| How to diagnose? | – Inspect wiring and connectors for damage or disconnection – Test the throttle position sensor for continuity – Replace damaged components |
P2620 Meaning
The P2620: Throttle Position Output Circuit/Open code indicates that the throttle position sensor (TPS) is not sending the necessary signal to the engine control module due to an open circuit. This can be caused by broken wiring, a disconnected or loose connector, or a faulty TPS. The throttle position sensor monitors the position of the throttle valve, and without accurate feedback, the ECM cannot properly manage air-fuel mixtures and engine speed, leading to reduced performance or hesitation.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any related codes. Address any additional codes first, as they may provide further insight into the underlying issue. | OBD-II Scanner |
| Inspect Wiring and Connectors | Visually inspect all wiring and connectors associated with the throttle position sensor. Look for signs of damage, disconnection, corrosion, or loose connections. Repair or replace as needed. | Flashlight, Multimeter |
| Test Throttle Position Sensor | Use a multimeter to check the throttle position sensor for continuity. Verify that the sensor is functioning properly and providing consistent readings based on throttle movement. | Multimeter, Diagnostic Tool |
| Check Sensor Mounting | Ensure that the throttle position sensor is correctly mounted. A loose sensor may lead to erratic readings or cause an open circuit condition. | Flashlight, Safety Gloves |
| Replace Faulty Components | If the sensor or related wiring is found to be faulty, replace the defective parts with components that meet the manufacturer’s specifications. | Replacement Parts |
| Clear the Code and Test Drive | After completing repairs, use an OBD-II scanner to clear the P2620 code. Start the engine and take it for a test drive to verify the throttle response and ensure that the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle to verify that the P2620 code has been successfully cleared. If the code reappears, additional diagnostics may be necessary to locate other possible faults. | OBD-II Scanner |
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