P2135 on FORD FOCUS — Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation

Q: "What does P2135 mean on a FORD FOCUS?"

"P2135 indicates: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. This is a powertrain code. 7 FORD FOCUS owners have reported this to NHTSA."

Q: "What are the most common causes of P2135 on FORD FOCUS?"

"Based on 7 NHTSA reports, the most commonly cited components are: Power Train,Vehicle Speed Control,Engine, Power Train,Engine,Fuel/Propulsion System, Vehicle Speed Control,Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints."

Q: "Is P2135 serious on my FORD FOCUS?"

"Of 7 NHTSA reports for this code on FORD FOCUS, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my FORD FOCUS shows P2135?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P2135 Means on Your FORD FOCUS

P2135 is a diagnostic trouble code indicating: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

7 FORD FOCUS owners have reported this issue to NHTSA across model years 2009-2010. Most reports come from the 2010, 2009 model years.

Real FORD FOCUS Owner Reports

Source: NHTSA Complaints Database

"Car went into limp home mode (wrench light) while pulling into traffic, sudden loss of power almost led to accident. my two year old was in the vehicle, with her side exposed to oncoming traffic when the car lost connection between the accelerator and throttle. returned home immediately."

— 2009 FORD FOCUS owner · POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE · Filed 05/18/2013

"My yellow wench check engine light came on,i was stopped at a 4 way city intersection and when i stepped on the gas pedal the car would not pick up any speed. i was stuck with traffic behind me."

— 2010 FORD FOCUS owner · POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM · Filed 06/05/2019

"I turned on the engine in the morning and the car seem to start fine, but when i put the gear selector in reverse and pressed the gas pedal suddenly the check engine came on and the car started shaking violently, i instantly turned off the car after a few seconds i tried turning the car back on, t"

— 2010 FORD FOCUS owner · VEHICLE SPEED CONTROL,ENGINE,FUEL/PROPULSION SYSTEM · Filed 05/01/2018

"Engine surged/faded a few times lately and twice the wrench symbol came on, but the dealership said no codes were reported and they could find no problems. today while driving on the interstate the speed suddenly decelerated to 0 so i pulled over to the shoulder to avoid being hit from behind."

— 2010 FORD FOCUS owner · POWER TRAIN · Filed 07/08/2015

"I drive approximately 1 hour each way to work and back. during this trip i am spend a lot of time on two lane major access roadways with speeds of 55 mph."

— 2010 FORD FOCUS owner · FUEL SYSTEM, GASOLINE,POWER TRAIN,ENGINE · Filed 04/07/2014

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'09

6

'10

Common Causes on FORD FOCUS

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE 14.3%

POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM 14.3%

VEHICLE SPEED CONTROL,ENGINE,FUEL/PROPULSION SYSTEM 14.3%

POWER TRAIN 14.3%

FUEL SYSTEM, GASOLINE,POWER TRAIN,ENGINE 14.3%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P2135 mean on a FORD FOCUS? ▾

P2135 indicates: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. This is a powertrain code. 7 FORD FOCUS owners have reported this to NHTSA.

What are the most common causes of P2135 on FORD FOCUS? ▾

Based on 7 NHTSA reports, the most commonly cited components are: Power Train,Vehicle Speed Control,Engine, Power Train,Engine,Fuel/Propulsion System, Vehicle Speed Control,Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints.

Is P2135 serious on my FORD FOCUS? ▾

Of 7 NHTSA reports for this code on FORD FOCUS, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my FORD FOCUS shows P2135? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.