P0838: Four Wheel Drive (4WD) Switch Circuit Low
What Does P0838 Mean?
P0838 is a diagnostic trouble code indicating: Four Wheel Drive (4WD) Switch Circuit Low. This code relates to the transmission system. It has been reported in NHTSA complaints across 1 different vehicle models.
Symptoms of P0838
- ⚠️ Transmission slipping
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"ON 3/14/2012 (31,604 MILES) WHILE PULLING OUT OF A PARKING SPACE THE TRANSMISSION STARTED TO GRIND AND THE VEHICLE LOST POWER. THE DEALER FOUND A STORED CODE R1790 AND RESET THE CODE UNABLE TO FIND FURTHER ISSUE. PICKED VEHICLE UP ON 3/15/2012 DROVE VEHICLE HOME. THE TRANSMISSION WAS NOTICEABLY SLI"
— Dodge Journey owner, 03/14/2012
Source: NHTSA Complaints Database
Most Reported Vehicles for P0838
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | DODGE JOURNEY |
Frequently Asked Questions
Is it safe to drive with this transmission code?
Do I need a full transmission rebuild?
How much does a transmission repair cost?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Check transmission fluid level and condition; top off or change if needed
- 🔧 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.