P2138 on CHEVROLET CAMARO — Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation

Q: "What does P2138 mean on a CHEVROLET CAMARO?"

"P2138 indicates: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation. This is a powertrain code. 4 CHEVROLET CAMARO owners have reported this to NHTSA."

Q: "What are the most common causes of P2138 on CHEVROLET CAMARO?"

"Based on 4 NHTSA reports, the most commonly cited components are: Unknown Or Other, Electrical System,Engine, Electrical System. These percentages are based on the component field in owner complaints."

Q: "Is P2138 serious on my CHEVROLET CAMARO?"

"Of 4 NHTSA reports for this code on CHEVROLET CAMARO, 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 CAMARO shows P2138?"

"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 P2138 Means on Your CHEVROLET CAMARO

P2138 is a diagnostic trouble code indicating: Throttle/Pedal Position Sensor/Switch D/E 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 CAMARO owners have reported this issue to NHTSA across model years 2011-2020. Most reports come from the 2011, 2012 model years.

Real CHEVROLET CAMARO Owner Reports

Source: NHTSA Complaints Database

"I was driving my vehicle to school, and all the sudden i get a message saying "Engine Power Reduced!" as soon as that happened, my vehicle's speed decreased rapidly. making it hard to keep up at the same speed as traffic, I plugged my scan tool."

— 2011 CHEVROLET CAMARO owner · UNKNOWN OR OTHER · Filed 11/12/2024

"Car has new engine and transmission everything is new and well maintained, p2138 pops up throttle quits working causing me to almost wreck into another vehicle, I was stuck in traffic 1 hour waiting for a tow truck, 7 shops have worked on the issue and replaced every part including all the technic"

— 2011 CHEVROLET CAMARO owner · ELECTRICAL SYSTEM,ENGINE · Filed 01/16/2023

"I am experiencing similar issues to those identified in GM bulletin 07-06-04-019F. I keep getting DTC P2138. What component or system failed or malfunctioned, and is it available for inspection upon request? The throttle/accelerator system. Yes."

— 2012 CHEVROLET CAMARO owner · ELECTRICAL SYSTEM · Filed 12/17/2025

"At random times the car will get the check engine light (Code P2138 when scanned) & show a message on the dash saying “engine power reduced”. This happened to me twice while driving on the highway & 4 other times while driving on city streets."

— 2020 CHEVROLET CAMARO owner · ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL · Filed 04/17/2021

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

📊 Complaint Trend by Model Year

2

'11

1

'12

1

'20

Common Causes on CHEVROLET CAMARO

Based on NHTSA complaint component analysis for this vehicle.

UNKNOWN or OTHER 25%

ELECTRICAL SYSTEM,ENGINE 25%

ELECTRICAL SYSTEM 25%

ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL 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 P2138 mean on a CHEVROLET CAMARO? ▾

P2138 indicates: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation. This is a powertrain code. 4 CHEVROLET CAMARO owners have reported this to NHTSA.

What are the most common causes of P2138 on CHEVROLET CAMARO? ▾

Based on 4 NHTSA reports, the most commonly cited components are: Unknown Or Other, Electrical System,Engine, Electrical System. These percentages are based on the component field in owner complaints.

Is P2138 serious on my CHEVROLET CAMARO? ▾

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

What should I do if my CHEVROLET CAMARO shows P2138? ▾

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.