Throttle/Pedal Pos Sensor/Switch E / F Voltage Correlation
P2140 indicates the throttle position sensor (TPS) or pedal position sensor is sending voltage signals that don't correlate properly with each other or expected values. This correlation mismatch prevents the engine control module from accurately determining driver intent, affecting throttle response and fuel injection timing.
What You Might Notice
- Engine stalling at stops or idle
- Loss of engine power or acceleration
- Sudden power loss at cruise speeds
- Throttle stuck at current RPM
- Check engine light illuminated
Most Common Causes
- 1
Faulty throttle position sensor
The TPS may be failing internally or producing inconsistent voltage signals that don't match expected values. This is the most common cause of voltage correlation faults.
- 2
Defective accelerator pedal position sensor
The pedal sensor may be malfunctioning, preventing proper signal transmission to the PCM and causing mismatch with throttle position readings.
- 3
Wiring issues or loose connectors
Corroded, damaged, or loose connections between sensors and the PCM can cause voltage signal inconsistencies and correlation errors.
- 4
Engine control module (PCM) malfunction
In rare cases, the PCM itself may have internal faults preventing proper sensor signal processing and correlation.
How to Diagnose It
- 1
Check Faulty throttle position sensor — The TPS may be failing internally or producing inconsistent voltage signals that don't match expected values. This is the most common cause of voltage correlation faults.
- 2
Check Defective accelerator pedal position sensor — The pedal sensor may be malfunctioning, preventing proper signal transmission to the PCM and causing mismatch with throttle position readings.
- 3
Check Wiring issues or loose connectors — Corroded, damaged, or loose connections between sensors and the PCM can cause voltage signal inconsistencies and correlation errors.
- 4
Check Engine control module (PCM) malfunction — In rare cases, the PCM itself may have internal faults preventing proper sensor signal processing and correlation.
How to Fix It
- 1
Test and replace throttle position sensor
Use a multimeter to check TPS voltage output at idle and under load. If readings are inconsistent or outside spec, replace the sensor with an OEM or quality aftermarket unit.
- 2
Inspect and test accelerator pedal sensor
Check pedal sensor connector and wiring for damage. Test voltage output across pedal range. Replace if readings don't correlate smoothly with pedal position.
- 3
Clean and inspect electrical connectors
Remove and inspect connectors for both throttle and pedal sensors for corrosion, bent pins, or loose contacts. Clean with electrical contact cleaner and reseat firmly. Check wiring harness for damage.
- 4
Perform PCM programming or replacement
If sensors and wiring test good, use a diagnostic scanner to reprogram the PCM or update software. If code persists, PCM replacement may be necessary.
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