P2138 on GMC YUKON — Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation

Q: "What does P2138 mean on a GMC YUKON?"

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

Q: "What are the most common causes of P2138 on GMC YUKON?"

"Based on 3 NHTSA reports, the most commonly cited components are: Vehicle Speed Control,Engine, Power Train,Engine, Vehicle Speed Control,Electronic Stability Control (Esc),Fuel/Propulsion System. These percentages are based on the component field in owner complaints."

Q: "Is P2138 serious on my GMC YUKON?"

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

Q: "What should I do if my GMC YUKON 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 GMC YUKON

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 GMC YUKON owners have reported this issue to NHTSA across model years 2007-2008. Most reports come from the 2008, 2007 model years.

Real GMC YUKON Owner Reports

Source: NHTSA Complaints Database

"Without warning, check engine light, reduced power and stability system shut down dash board engine light came on and stayed on. had engine code scanned (p2138, p0102) still problem is not resolved. dealer was no help just wanted to sell parts that may fix it."

— 2007 GMC YUKON owner · VEHICLE SPEED CONTROL,ENGINE · Filed 10/27/2014

"Tl* the contact owns a 2008 gmc yukon xl. the contact stated that the vehicle would only accelerate to 10 t0 15 mph. in addition, the stabilitrac, engine control module, and engine power reduced indicators illuminated. the contact was able to drive the vehicle onto the road shoulder."

— 2008 GMC YUKON owner · POWER TRAIN,ENGINE · Filed 02/01/2010

"This is twice that i've received the p2138 throttle body sensor code, which causes reduced engine power and has subsequent issues around stabilitrack/awd. the first time was in the middle of an intersection, we limped out of the intersection at 3 mph. today, my wife limped home from the store."

— 2008 GMC YUKON owner · VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),FUEL/PROPULSION SYSTEM · Filed 11/26/2014

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

📊 Complaint Trend by Model Year

1

'07

2

'08

Common Causes on GMC YUKON

Based on NHTSA complaint component analysis for this vehicle.

VEHICLE SPEED CONTROL,ENGINE 33.3%

POWER TRAIN,ENGINE 33.3%

VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),FUEL/PROPULSION SYSTEM 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 GMC YUKON? ▾

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

What are the most common causes of P2138 on GMC YUKON? ▾

Based on 3 NHTSA reports, the most commonly cited components are: Vehicle Speed Control,Engine, Power Train,Engine, Vehicle Speed Control,Electronic Stability Control (Esc),Fuel/Propulsion System. These percentages are based on the component field in owner complaints.

Is P2138 serious on my GMC YUKON? ▾

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

What should I do if my GMC YUKON 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.