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

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

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

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

"Based on 4 NHTSA reports, the most commonly cited components are: Vehicle Speed Control, Fuel/Propulsion System, Electronic Stability Control (Esc),Service Brakes. These percentages are based on the component field in owner complaints."

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

"Of 4 NHTSA reports for this code on CHEVROLET TAHOE, 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 TAHOE 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 TAHOE

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 TAHOE owners have reported this issue to NHTSA across model years 2010-2013. Most reports come from the 2011, 2010 model years.

Real CHEVROLET TAHOE Owner Reports

Source: NHTSA Complaints Database

"2010 chevrolet tahoe ltz check engine light came on and would drive but in a jerking motion. we had vehicle towed to our mechanic who diagnosed the issue as a engine control module dtc p2135, the reduced engine power displayed and the traction off also displayed."

— 2010 CHEVROLET TAHOE owner · VEHICLE SPEED CONTROL · Filed 01/06/2015

"My 2011 chevy tahoe was in motion on a town road when several alerts came up on the dashboard including service traction control, service stabilink and reduced engine power. the local dealer used a scan tool and found dtc # p2135 - throttle position sensor."

— 2011 CHEVROLET TAHOE owner · FUEL/PROPULSION SYSTEM · Filed 01/22/2019

"I was driving on the highway at approx 65 mph. the truck dropped speed rapidly and without warning. lights starting flashing and stating reduced engine power - service stabilitrak. when attempting to pull over i applied the brakes and the truck lunged forward."

— 2011 CHEVROLET TAHOE owner · ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES · Filed 03/27/2013

"While driving vehicle continues to drop into reduced power mode causing a jarring motion as it drops a significant amount of speed,almost causing multiple accidents."

— 2013 CHEVROLET TAHOE owner · VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),ENGINE · Filed 06/08/2017

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

📊 Complaint Trend by Model Year

1

'10

2

'11

1

'13

Common Causes on CHEVROLET TAHOE

Based on NHTSA complaint component analysis for this vehicle.

VEHICLE SPEED CONTROL 25%

FUEL/PROPULSION SYSTEM 25%

ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES 25%

VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),ENGINE 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 TAHOE? ▾

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

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

Based on 4 NHTSA reports, the most commonly cited components are: Vehicle Speed Control, Fuel/Propulsion System, Electronic Stability Control (Esc),Service Brakes. These percentages are based on the component field in owner complaints.

Is P2135 serious on my CHEVROLET TAHOE? ▾

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

What should I do if my CHEVROLET TAHOE 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.