P2133 — Throttle/Pedal Position Sensor/Switch "F" Circuit High

OBD2 code P2133 flags a problem with the throttle and intake air metering (throttle/pedal position sensor/switch "F" circuit high). Short, gentle driving to a shop is usually possible. Common culprits: intake air leaks after the MAF sensor, wiring or connector faults in the throttle circuit, faulty throttle position sensor or pedal sensor.

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 P2133 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 With the throttle/pedal position sensor/switch "F" disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
  5. Subsystem check Inspect and clean the throttle body; check that the plate moves freely.
  6. Subsystem check Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
  7. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2133 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2133 (parts and labor, USD, independent shop rates): Replace the throttle body assembly: $250–$700; Clean the throttle body: $80–$200; Replace the MAF or MAP sensor: $150–$400. Overall, fixing P2133 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

What is the most common cause of P2133?

The most common causes are: intake air leaks after the MAF sensor, wiring or connector faults in the throttle circuit, faulty throttle position sensor or pedal sensor.

Will P2133 clear itself?

Sometimes P2133 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.

How much does it cost to fix P2133?

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

How do I diagnose P2133 myself?

Start with a scan: confirm P2133, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the throttle/pedal position sensor/switch "F", and verify the suspect component against live data before buying parts.

What are the symptoms of P2133?

Drivers most often notice: poor throttle response, stalling when coming to a stop, Check Engine Light on, limp-home mode with reduced power.

What does P2133 mean?

P2133 is logged by the onboard diagnostics when the throttle and intake air metering does not behave as expected. The official definition is “Throttle/Pedal Position Sensor/Switch "F" Circuit High”. This is a powertrain (engine/transmission) category code.

“Circuit high” means the control module sees a voltage on the throttle/pedal position sensor/switch "F" circuit that is above the expected range — typically close to battery voltage. Physically this points to a short to a power feed, a broken ground return, or a failed component pulling the signal line high.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2133 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of P2133

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

What causes P2133?

  • signal wire shorted to battery positive
  • open ground return of the throttle/pedal position sensor/switch "F"
  • failed throttle/pedal position sensor/switch "F" pulling the signal high
  • intake air leaks after the MAF sensor
  • dirty throttle body or stuck throttle plate
  • faulty throttle position sensor or pedal sensor
  • contaminated or failed MAF/MAP sensor
  • failed electronic throttle motor

How to diagnose P2133

  1. Connect an OBD2 scanner, confirm P2133 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. With the throttle/pedal position sensor/switch "F" disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
  5. Inspect and clean the throttle body; check that the plate moves freely.
  6. Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
  7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2133 does not return.

How to fix P2133

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

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

How much does it cost to fix P2133?

Repair cost depends on which component actually failed. Typical scenarios for P2133 (parts and labor, USD, independent shop rates):

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

Overall, fixing P2133 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 P2133?

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