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

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

"P2138 indicates: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation. This is a powertrain code. 3 CHEVROLET COLORADO owners have reported this to NHTSA."

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

"Based on 3 NHTSA reports, the most commonly cited components are: Electrical System,Engine, Vehicle Speed Control, Power Train,Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints."

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

"Of 3 NHTSA reports for this code on CHEVROLET COLORADO, 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 COLORADO 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 COLORADO

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.

3 CHEVROLET COLORADO owners have reported this issue to NHTSA across model years 2016-2017. Most reports come from the 2017, 2016 model years.

Real CHEVROLET COLORADO Owner Reports

Source: NHTSA Complaints Database

"During any type of moisture ie (fog, rain) vehicle goes into reduced engine power mode codes from the ecm p2122 and p2138 both relating to app. first time it happened was in rain storm in motion, app pedal was replaced with new oem part but the problem persists."

— 2016 CHEVROLET COLORADO owner · ELECTRICAL SYSTEM,ENGINE · Filed 01/24/2021

"Received a P2138 Throttle/Pedal position sensor/switch "D"/"E" voltage correlation code while driving that caused "Reduced Power" and "stabilitrak" errors."

— 2017 CHEVROLET COLORADO owner · VEHICLE SPEED CONTROL · Filed 07/01/2020

"I got a check engine light while and engine goes into reduced power mode. you can't drive in reduced power mode! i have to clear it to move the truck. i did a scan which showed a p2138 code."

— 2017 CHEVROLET COLORADO owner · POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE · Filed 09/10/2019

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

📊 Complaint Trend by Model Year

1

'16

2

'17

Common Causes on CHEVROLET COLORADO

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM,ENGINE 33.3%

VEHICLE SPEED CONTROL 33.3%

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE 33.3%

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 P2138 mean on a CHEVROLET COLORADO? ▾

P2138 indicates: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation. This is a powertrain code. 3 CHEVROLET COLORADO owners have reported this to NHTSA.

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

Based on 3 NHTSA reports, the most commonly cited components are: Electrical System,Engine, Vehicle Speed Control, Power Train,Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints.

Is P2138 serious on my CHEVROLET COLORADO? ▾

Of 3 NHTSA reports for this code on CHEVROLET COLORADO, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET COLORADO 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.