As a car expert, I understand how frustrating it can be when your vehicle is not functioning properly. One common issue that many car owners face is the P1850 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Ground. This problem can cause your car to stall or not shift gears properly, which can be dangerous on the road. In this article, I will provide you with a step-by-step guide on how to fix this issue and get your car back on the road safely.
Step 1: Diagnose the Problem
Before you can fix the issue, you need to diagnose the problem. The P1850 code indicates that there is a short circuit to ground in the feedback circuit of the transfer case differential lock-up solenoid. This can be caused by a faulty solenoid, damaged wiring, or a bad ground connection. To diagnose the problem, you will need an OBD-II scanner to read the code and determine the cause of the issue.
Step 2: Replace the Solenoid
If the OBD-II scanner indicates that the solenoid is faulty, you will need to replace it. The solenoid is located on the transfer case and can be accessed by removing the transfer case skid plate. Once you have removed the skid plate, you can disconnect the wiring harness from the solenoid and remove the solenoid from the transfer case. Replace the solenoid with a new one and reconnect the wiring harness.
Step 3: Check the Wiring
If the solenoid is not the issue, you will need to check the wiring for damage or corrosion. Start by inspecting the wiring harness for any visible damage or corrosion. If you find any damage, you will need to replace the damaged wiring. If the wiring appears to be in good condition, you can use a multimeter to test the continuity of the wiring. Check the wiring from the solenoid to the PCM for continuity. If there is no continuity, you will need to repair or replace the wiring.
Step 4: Check the Ground Connection
If the wiring is not the issue, you will need to check the ground connection. The ground connection for the solenoid is located on the transfer case. Check the ground connection for corrosion or damage. If the ground connection appears to be in good condition, you can use a multimeter to test the continuity of the ground connection. If there is no continuity, you will need to repair or replace the ground connection.
Step 5: Clear the Code
Once you have fixed the issue, you will need to clear the code from the PCM. Use an OBD-II scanner to clear the code and reset the PCM. This will ensure that the issue has been resolved and that your car is functioning properly.
Fixing the P1850 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Ground can be a daunting task, but with the right tools and knowledge, it can be done. By following the steps outlined in this article, you can diagnose and fix the issue and get your car back on the road safely.
1. Can I drive my car with the P1850 code?
It is not recommended to drive your car with the P1850 code as it can cause your car to stall or not shift gears properly, which can be dangerous on the road.
2. How much does it cost to fix the P1850 code?
The cost to fix the P1850 code can vary depending on the cause of the issue. If the solenoid needs to be replaced, it can cost between $100 and $300. If the wiring or ground connection needs to be repaired, it can cost between $200 and $500.
3. Can I fix the P1850 code myself?
If you have the right tools and knowledge, you can fix the P1850 code yourself. However, if you are not comfortable working on your car, it is recommended to take it to a professional mechanic.