Throttle/Pedal Position Sensor Minimum Stop Performance
The P2115 code indicates that the Engine Control Module (ECM) has detected a malfunction in the throttle position sensor or accelerator pedal position sensor circuit, specifically related to the minimum stop position. This means the sensor is not reading the idle or closed throttle position correctly, often due to a faulty sensor, wiring issues, or carbon buildup on the throttle body. The ECM uses this input to control idle speed, throttle response, and transmission shifting.
1. Most Common Causes
- Faulty throttle position sensor (TPS) or electronic throttle body
- Carbon buildup or dirt on the throttle plate preventing full closure
- Open or short circuit in the sensor wiring
- Poor electrical connection or corroded terminals at the TPS connector
- Mechanical failure of the throttle plate stop
- Defective powertrain control module (PCM) (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor idle, stalling, or hesitation on acceleration
- Unresponsive or jerky throttle pedal
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data. Clear code and test drive to see if it returns.
Step 2: Visually inspect throttle body for carbon buildup; clean if necessary.
Step 3: Test throttle position sensor and accelerator pedal position sensor voltage and resistance per manufacturer specs.
Step 4: Check wiring and connectors for damage, corrosion, or loose connections.
Step 5: If all else fails, replace the throttle position sensor or accelerator pedal position sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The vehicle may enter limp mode, reducing power and potentially causing unsafe driving conditions, especially in traffic.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, but can be higher if the throttle body assembly needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.