P1849
PPowertrainTransfer Case Diff Lock Switch Short to Battery
What does this code mean?
Severity : MediumP1849 reports a short to battery voltage on the transfer case differential lock-up feedback switch. This switch tells the module whether the differential lock is actually engaged, so it can manage four-wheel drive correctly. This is a manufacturer-specific code: the exact meaning depends on the manufacturer.
Symptoms
- Check engine or 4WD light on.
- Incorrect differential lock indicator.
- Differential lock or 4WD unavailable.
- Binding or jerking in corners if the actual state is misread.
Possible causes
- Switch wire shorted to a voltage source.
- Faulty feedback switch.
- Corroded or damaged connector under the vehicle.
- Wiring damaged by road debris or heat.
- Faulty transfer case module, less often.
Diagnosis and repair
- Check the manufacturer documentation to locate the switch.
- Inspect the wiring and connector on the transfer case.
- Measure voltage on the switch circuit with the lock engaged and disengaged.
- Repair the short or replace the switch.
- Clear the code and test lock engagement.
Is this vehicle in your workshop?
Upload the ORI file: it is processed automatically in a few minutes, 24/7, and a calibration engineer takes over complex cases during opening hours.
Are you a driver?
Find a garage or a diagnostics and remapping specialist near you.
Find a pro on ChiptuneMAPCode details
Code
P1849
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012