Throttle/Pedal Position Sensor E/F Voltage Correlation Mismatch
Code P2140 indicates that the Engine Control Module (ECM) has detected a voltage correlation error between the throttle position sensor (TPS) circuits E and F (or pedal position sensor circuits). This typically means the two sensor signals are not matching within a specified range, often due to a faulty sensor, wiring issues, or a defective throttle body. The ECM uses these signals to determine driver demand and control throttle actuation; a mismatch can lead to reduced engine power or limp mode.
01. Most Common Causes
- Faulty throttle position sensor (TPS) or accelerator pedal position sensor (APP)
- Wiring or connector issues (shorts, opens, corrosion) in sensor circuits
- Carbon buildup on throttle body causing erratic sensor readings
- Defective ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration or hesitation
- Erratic idle or stalling
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage, corrosion, or loose connections.
Step 3: Use a multimeter to check voltage and ground signals at the sensor connectors per manufacturer specs.
Step 4: Compare sensor voltage readings with a scan tool while slowly pressing the accelerator pedal.
Step 5: If readings are erratic or out of range, replace the faulty sensor or throttle body assembly.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. The vehicle may enter limp mode, limiting speed and acceleration, which can be dangerous in traffic.
How much does it cost to fix?▼
Typical repair costs range from $150 to $400, including parts (sensor or throttle body) and labor.