Throttle/Pedal Position Sensor Maximum Stop Performance Issue
Code P2164 indicates that the Engine Control Module (ECM) has detected a problem with the throttle or pedal position sensor's maximum stop performance. This typically means the sensor signal is out of expected range when the pedal is fully released or fully depressed, often due to sensor misalignment, wiring issues, or a faulty sensor. The ECM uses this sensor to determine driver demand and control throttle opening; a fault can lead to reduced engine power or limp mode.
1. Most Common Causes
- Faulty throttle/pedal position sensor
- Wiring or connector issues (corrosion, damage, loose connection)
- Sensor misalignment or mechanical binding
- ECM software or calibration error
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor throttle response or hesitation
- Erratic idle or stalling
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the throttle/pedal position sensor connector and wiring for damage or corrosion.
Step 3: Test sensor voltage and resistance with a multimeter per manufacturer specs.
Step 4: Check for mechanical binding or misalignment of the throttle pedal or throttle body.
Step 5: If no issues found, replace the sensor and clear codes; test drive to verify repair.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause reduced engine power, limp mode, or stalling, which may be dangerous in traffic. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and whether the sensor or wiring needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.