P1682: P1684
What Does P1682 Mean?
P1682 is a diagnostic trouble code indicating: P1684. This code relates to the manufacturer-specific powertrain system. It has been reported in NHTSA complaints across 6 different vehicle models.
Symptoms of P1682
- ⚠️ Check engine light illuminated
- ⚠️ Loss of engine power
- ⚠️ Traction control system activated
- ⚠️ Vehicle enters limp/reduced power mode
Common Causes
- 🔍 Faulty oxygen sensor
- 🔍 Worn or fouled spark plugs
- 🔍 Throttle body or throttle position sensor issue
- 🔍 Dirty or failed MAF sensor
- 🔍 Wiring or connector problem
- 🔍 EVAP system component failure
P1682 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"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. One said it could be the ignition and the other said it could be accelerator position sensor on gas "
— Chevrolet Silverado owner, 10/21/2024
"ENGINE GOES INTO REDUCED POWER MODE AFTER DASH TROUBLE LIGHTS SHOW, SERVICE ECU, TRACTION CONTROL ERRORS AND ENGINE LIGHT COMES ON. SEVERE SAFETY THREAT WHEN IN REDUCED POWER MODE. P1682 CODE DEALER SAID IT WAS KNOCK SENSOR AND WIRING HARNESS, DID NOT RESOLVE. NEEDS TO BE ADDRESSED IMMEDIATELY. THIS"
— Chevrolet Malibu owner, 05/01/2019
"While driving 65 to 70 mph on the freeway, vehicle suddenly shudders and dash state "engine reduce speed" and "service stabilitrak" and "service traction control". It has happen about twice a month 6 months back. Took it to the dealership, no code so they couldn't find the issue even though I should"
— Chevrolet Traverse owner, 12/02/2021
Source: NHTSA Complaints Database
Most Reported Vehicles for P1682
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHEVROLET TRAVERSE | |
| 2 | GMC ACADIA | |
| 3 | CHEVROLET IMPALA | |
| 4 | GMC ENVOY | |
| 5 | CHEVROLET SILVERADO | |
| 6 | CHEVROLET MALIBU |
P1682 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Check and tighten the gas cap — replace if cracked or damaged ($5-15)
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.