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

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

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

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

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

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

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

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 SILVERADO owners have reported this issue to NHTSA across model years 2007-2008. Most reports come from the 2007, 2008 model years. The most commonly reported component is Electrical System,Vehicle Speed Control (66.7% of reports).

Real CHEVROLET SILVERADO Owner Reports

Source: NHTSA Complaints Database

"T ruck left my wife totally stranded in the middle of a busy intersection. It was running but would not accelerate. I ran the codes and 2 codes that has never popped up before was P1682 and P2138."

— 2008 CHEVROLET SILVERADO owner · ELECTRICAL SYSTEM,ENGINE · Filed 10/21/2024

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

📊 Complaint Trend by Model Year

2

'07

1

'08

Common Causes on CHEVROLET SILVERADO

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL 66.7%

ELECTRICAL SYSTEM,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 SILVERADO? ▾

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

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

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

Is P2138 serious on my CHEVROLET SILVERADO? ▾

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

What should I do if my CHEVROLET SILVERADO 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.