P2135 on CHEVROLET IMPALA — Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation

Q: "What does P2135 mean on a CHEVROLET IMPALA?"

"P2135 indicates: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. This is a powertrain code. 4 CHEVROLET IMPALA owners have reported this to NHTSA."

Q: "What are the most common causes of P2135 on CHEVROLET IMPALA?"

"Based on 4 NHTSA reports, the most commonly cited components are: Electrical System,Engine, Vehicle Speed Control,Unknown Or Other,Electronic Stability Control (Esc), Electronic Stability Control (Esc). These percentages are based on the component field in owner complaints."

Q: "Is P2135 serious on my CHEVROLET IMPALA?"

"Of 4 NHTSA reports for this code on CHEVROLET IMPALA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHEVROLET IMPALA 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 CHEVROLET IMPALA

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.

4 CHEVROLET IMPALA owners have reported this issue to NHTSA across model years 2006-2011. Most reports come from the 2011, 2006 model years.

Real CHEVROLET IMPALA Owner Reports

Source: NHTSA Complaints Database

"Had purchased vehicle from dealer in ashland va back in september 2014. had no concerns about the vehicle until first trip not driving vehicle for a week and upon return vehicle would not start. had jumped started vehicle and got check engine light which was on for three days then cut off."

— 2006 CHEVROLET IMPALA owner · ELECTRICAL SYSTEM,ENGINE · Filed 11/17/2014

"Driving home one night after just having my vehicle repaired a few weeks earlier, without warning, my vehicle began to stall. just before the stall it was driving completely normal with no issues at all."

— 2010 CHEVROLET IMPALA owner · VEHICLE SPEED CONTROL,UNKNOWN OR OTHER,ELECTRONIC STABILITY CONTROL (ESC) · Filed 04/19/2017

"Backing out of my garage when check engine, stabilitrak problem, reduced engine power light came on message portion of dash.drove under reduced power, max 30 mph, to dealer, approximately 15 miles. left car with dealer for approximately 2 days."

— 2011 CHEVROLET IMPALA owner · ELECTRONIC STABILITY CONTROL (ESC) · Filed 03/06/2014

"I own a 2011 chevy impala and for the past couple months on 6 different occasions as i am driving down the freeway my engine power is reduced and "service stabilitrak" light appears. as i have researched and have found that this is a common and very unsafe problem among gm vehicles."

— 2011 CHEVROLET IMPALA owner · ELECTRICAL SYSTEM,EQUIPMENT · Filed 03/12/2013

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

📊 Complaint Trend by Model Year

1

'06

1

'10

2

'11

Common Causes on CHEVROLET IMPALA

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM,ENGINE 25%

VEHICLE SPEED CONTROL,UNKNOWN or OTHER,ELECTRONIC STABILITY CONTROL (ESC) 25%

ELECTRONIC STABILITY CONTROL (ESC) 25%

ELECTRICAL SYSTEM,EQUIPMENT 25%

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 CHEVROLET IMPALA? ▾

P2135 indicates: Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. This is a powertrain code. 4 CHEVROLET IMPALA owners have reported this to NHTSA.

What are the most common causes of P2135 on CHEVROLET IMPALA? ▾

Based on 4 NHTSA reports, the most commonly cited components are: Electrical System,Engine, Vehicle Speed Control,Unknown Or Other,Electronic Stability Control (Esc), Electronic Stability Control (Esc). These percentages are based on the component field in owner complaints.

Is P2135 serious on my CHEVROLET IMPALA? ▾

Of 4 NHTSA reports for this code on CHEVROLET IMPALA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET IMPALA 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.