What Does P1885 Mean?
The transfer case disengaged solenoid circuit is shorted to battery voltage. The solenoid is receiving constant power when it should be controlled by the TCM.
Common Causes
45%
Chafed wiring harness causing short to power source
25%
Failed solenoid with internal short to battery terminal
18%
Damaged connector with terminals touching or contamination bridging circuits
8%
Incorrect wiring repair or aftermarket component installation
4%
TCM internal short circuit in driver stage
Diagnostic Steps
1
Step 1: Disconnect disengaged solenoid connector and measure voltage at harness control wire with key on (should be 0V)
2
Step 2: Inspect entire wiring harness route for chafing, pinch points, or contact with hot surfaces
3
Step 3: Check solenoid internal resistance and test for shorts between terminals
4
Step 4: Inspect connectors for contamination, moisture, damaged seals, or bent/damaged pins
5
Step 5: If wiring and components test normal, perform TCM output driver tests per service manual
Estimated Repair Cost
$150 - $1,150
Parts + labor, varies by vehicle and location
The transfer case disengaged solenoid circuit is shorted to battery voltage. The solenoid is receiving constant power when it should be controlled by the TCM.
The most common cause of P1885 (Transmission Transfer Case Disengaged Solenoid Short to Battery) is: Chafed wiring harness causing short to power source
Typical repair costs for P1885 range from $150 to $1,150, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause uncontrolled transfer case operation or prevent proper engagement of drive modes. Could result in unexpected drivetrain behavior.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1885 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transfer Case / 4WD System
Difficulty
Type
Manufacturer
Recommended Tools
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