P2136 — Throttle/Pedal Pos Sensor/Switch A / C Voltage Correlation

OBD2 code P2136 flags a problem with the throttle and intake air metering (throttle/pedal pos sensor/switch a / c voltage correlation). Short, gentle driving to a shop is usually possible. Common culprits: wiring or connector faults in the throttle circuit, intake air leaks after the MAF sensor, 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

Read the code and freeze frame Connect an OBD2 scanner, confirm P2136 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
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.
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.
Subsystem check Inspect and clean the throttle body; check that the plate moves freely.
Subsystem check Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2136 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2136 (parts and labor, USD, independent shop rates): Replace the MAF or MAP sensor: $150–$400; Clean the throttle body: $80–$200; Replace the throttle body assembly: $250–$700. Overall, fixing P2136 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 are the symptoms of P2136?

Drivers most often notice: limp-home mode with reduced power, Check Engine Light on, unstable or high idle, poor throttle response.

How do I diagnose P2136 myself?

Start with a scan: confirm P2136, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the throttle and intake air metering, and verify the suspect component against live data before buying parts.

What does OBD2 code P2136 mean?

Will P2136 clear itself?

Sometimes P2136 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 is the most common cause of P2136?

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

What does P2136 mean?

Seeing P2136 on your scanner? The control unit has caught the throttle and intake air metering operating outside its calibrated window. The formal description is “Throttle/Pedal Pos Sensor/Switch A / C Voltage Correlation”, and the code is grouped under powertrain (engine/transmission) faults.

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 P2136 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of P2136

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

What causes P2136?

contaminated or failed MAF/MAP sensor
failed electronic throttle motor
intake air leaks after the MAF sensor
dirty throttle body or stuck throttle plate
faulty throttle position sensor or pedal sensor
wiring or connector faults in the throttle circuit

How to diagnose P2136

Connect an OBD2 scanner, confirm P2136 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
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.
Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
Inspect and clean the throttle body; check that the plate moves freely.
Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2136 does not return.

How to fix P2136

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

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

How much does it cost to fix P2136?

Repair cost depends on which component actually failed. Typical scenarios for P2136 (parts and labor, USD, independent shop rates):

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

Overall, fixing P2136 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 P2136?

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.