P2138 on Chevrolet Camaro
Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Chevrolet Camaro context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P2138.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
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.
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."
"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"
"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."
"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."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on Chevrolet Camaro
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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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.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.