P2140 — Throttle/Pedal Pos Sensor/Switch E / F Voltage Correlation

powertrain (engine/transmission)

Is it safe to drive?

Drive with caution Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P2140 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
  4. Subsystem check Inspect and clean the throttle body; check that the plate moves freely.
  5. Subsystem check Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2140 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2140 (parts and labor, USD, independent shop rates): Replace the throttle body assembly: $250–$700; Replace the MAF or MAP sensor: $150–$400; Clean the throttle body: $80–$200. Overall, fixing P2140 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Will P2140 clear itself?

Sometimes P2140 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What are the symptoms of P2140?

Drivers most often notice: Check Engine Light on, limp-home mode with reduced power, unstable or high idle, stalling when coming to a stop.

What does OBD2 code P2140 mean?

Throttle/Pedal Pos Sensor/Switch E / F Voltage Correlation (P2140): a powertrain (engine/transmission) fault affecting the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Most often caused by contaminated or failed MAF/MAP sensor, wiring or connector faults in the throttle circuit, intake air leaks after the MAF sensor.

What is the most common cause of P2140?

The most common causes are: contaminated or failed MAF/MAP sensor, wiring or connector faults in the throttle circuit, intake air leaks after the MAF sensor.

How much does it cost to fix P2140?

Replace the throttle body assembly — $250–$700; Replace the MAF or MAP sensor — $150–$400; Clean the throttle body — $80–$200. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does P2140 mean?

The engine control module sets P2140 when it detects a fault in the throttle and intake air metering. In practical terms: throttle/pedal pos sensor/switch e / f voltage correlation. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2140 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

What causes P2140?

  • contaminated or failed MAF/MAP sensor
  • intake air leaks after the MAF sensor
  • wiring or connector faults in the throttle circuit
  • failed electronic throttle motor

Common symptoms of P2140

  • Check Engine Light on
  • limp-home mode with reduced power
  • unstable or high idle
  • stalling when coming to a stop
  • poor throttle response

How to diagnose P2140

  1. Connect an OBD2 scanner, confirm P2140 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
  4. Inspect and clean the throttle body; check that the plate moves freely.
  5. Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2140 does not return.

How to fix P2140

Start with the cheapest and most common causes before replacing expensive parts:

  • Replace the throttle body assembly — $250–$700
  • Replace the MAF or MAP sensor — $150–$400
  • Clean the throttle body — $80–$200

How much does it cost to fix P2140?

Repair cost depends on which component actually failed. Typical scenarios for P2140 (parts and labor, USD, independent shop rates):

  • Replace the throttle body assembly: $250–$700
  • Replace the MAF or MAP sensor: $150–$400
  • Clean the throttle body: $80–$200

Overall, fixing P2140 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2140?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

Related OBD2 codes