The P2166: Throttle/Pedal Position Sensor ‘D’ Maximum Stop Performance refers to an issue where the throttle or pedal position sensor ‘D’ fails to properly register the maximum stop position. This could be caused by a faulty sensor, calibration problems, or mechanical issues with the throttle or pedal mechanism.
P2166 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2166: Throttle/Pedal Position Sensor ‘D’ Maximum Stop Performance |
| Is it serious? | Yes, it can affect throttle response and vehicle acceleration, impacting drivability and safety. |
| Possible causes | – Faulty throttle/pedal position sensor ‘D’ – Sensor calibration issues – Mechanical problems with the throttle or pedal |
| How to diagnose? | – Test the throttle/pedal position sensor ‘D’ for performance issues – Verify sensor calibration – Inspect the throttle and pedal mechanism for issues |
P2166 Meaning
The P2166: Throttle/Pedal Position Sensor ‘D’ Maximum Stop Performance code indicates that the engine control module (ECM) has detected an issue with the maximum stop position of throttle or pedal position sensor ‘D’. This sensor is responsible for providing critical data regarding throttle or pedal position, which affects the amount of air entering the engine and controls vehicle acceleration. A malfunction in this sensor can result in poor throttle response and erratic vehicle performance.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for other related codes that may provide additional information about the issue. | OBD-II Scanner |
| Inspect Throttle and Pedal Mechanism | Inspect the throttle and pedal mechanisms for any signs of wear, damage, or mechanical obstructions that could affect the sensor’s performance. | Flashlight, Safety Gloves |
| Test Throttle/Pedal Position Sensor ‘D’ | Use a multimeter or diagnostic tool to test the throttle/pedal position sensor ‘D’ for proper functionality. Compare the sensor readings to manufacturer specifications. | Multimeter, Diagnostic Tool |
| Verify Sensor Calibration | Check the calibration of throttle/pedal position sensor ‘D’ to ensure it is within manufacturer specifications. Recalibrate if necessary. | Calibration Tool (if needed) |
| Check for Mechanical Issues | Inspect the throttle body, linkage, and pedal assembly for any mechanical problems that could interfere with the sensor’s performance. | Flashlight, Wrenches |
| Repair or Replace Faulty Components | If any components, including the sensor or mechanical parts, are found to be faulty, repair or replace them to resolve the issue. | Replacement Parts, Tools |
| Clear the Code and Test Drive | After repairs, clear the P2166 code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to confirm that the P2166 code does not return. | OBD-II Scanner |
Free PDF: How to choose OBD2 scanner
I’ve made you a free PDF to choose the OBD2 scanner in 5 minutes.
✅ Which OBD2 scanner is best?
✅ Which type should you get (DIY, Pro, Hobby)
✅ What is the best scanner for the exact brand/feature (e.g best for BMW)
✅ How to get a Bi-Directional tool for as cheap as $40
✅ Discount coupons for scanners
PDF is 100% free and it is designed to help you pick a scanner in less than a few minutes! Not a boring 50-page guide.
Just tell me where to send it.
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)