P2109: Throttle/Pedal Position Sensor A Minimum Stop Performance
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to generic code level because this page is not scoped to one make or model.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P2109.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What Does P2109 Mean?
P2109 code: Throttle/Pedal Position Sensor A Minimum Stop Performance. Symptoms, likely causes, diagnostic path, severity, and repair cost context.
Symptoms of P2109
- ⚠️ Warning light or diagnostic trouble code is stored
- ⚠️ Reduced power, unstable throttle response, high idle, or limp mode may occur
- ⚠️ Traction/stability messages may appear when throttle data is implausible
- ⚠️ Vehicle may fail an emissions or safety inspection until the code is resolved and monitors reset
Common Causes
- 🔍 Sensor reading, wiring, connector, actuator, emissions, or module condition detected by the control module
- 🔍 Low battery voltage, poor ground, software, or network issue affecting the related circuit
- 🔍 Mechanical condition that should be confirmed with live data before replacing parts
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The contact owns a 2012 Toyota Camry. The contact stated while driving 20 MPH, the vehicle hesitated while accelerating before slamming into gear. The contact stated that the vehicle was shuddering abnormally. There were no warning lights illuminated. The vehicle was taken to a dealer to be diagnose"
— Toyota Camry owner, 2025-02-17
Source: NHTSA Complaints Database
Most Reported Vehicles for P2109
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | TOYOTA CAMRY |
Frequently Asked Questions
Is P2109 enough to replace a part?
Can I drive with P2109?
What To Do Next
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.