Jeep owners may be experiencing U0140 code, a lost communication with the body control module. This code is triggered when a Jeep’s engine is running and the battery voltage is more than 10 volts, but the body control module has not received any messages for 20 seconds. The causes of this code can range from a communication link failure, an open PCI bus circuit, or a failed PCM. In order to identify and resolve the problem, several service bulletins have been issued by Jeep, such as 18-023-16, 18-024-15, 18-024-16, 18-024-16 REV. A, 18-024-16 REV. B, 18-025-16, 18-025-16 REV. A, 18-041-16, 18-041-16 REV. A, 18-060-16, 18-064-16, 18-064-16 REV. A, 18-068-14, 18-077-15, 18-077-16, 18-083-16, 18-092-16, 18-096-15, S1625000005, and S2208000166. In order to identify and resolve the Jeep Code U0140, understanding the potential causes and solutions is essential.
Causes and Solutions for Jeep Code U0140
| Causes | Solutions |
|---|---|
| Communication Link Failure | Check wiring harness and connections for possible defects |
| PCI Bus circuit open | Replace the circuit and recheck the system |
| PCM has failed | Replace the Powertrain Control Module (PCM) |
| Software Issues | Update the software to the latest version |
Jeep Code U0140 can be a frustrating problem for Jeep owners. The code is triggered when a Jeep’s engine is running and the battery voltage is more than 10 volts, but the body control module has not received any messages for 20 seconds. Fortunately, understanding the potential causes and solutions of this code can help owners identify and resolve the issue. This article outlines the causes and solutions for Jeep Code U0140, including communication link failure, PCI bus circuit open, PCM failure, and software issues. By understanding the potential causes and solutions, Jeep owners can identify and resolve the problem quickly.
Communication Link Failure
A communication link failure is one potential cause of Jeep Code U0140. If this is the case, the first step is to check the wiring harness and connections for any possible defects. This might involve visually inspecting the wiring and looking for any signs of wear or damage. If any defects are found, they should be addressed before further troubleshooting is conducted.
PCI Bus Circuit Open
If the problem is related to the PCI bus circuit, the next step is to replace the circuit and recheck the system. This can often resolve the issue. It is important to ensure that all connections are secure and that the wiring is in good condition.
PCM Failure
If the Powertrain Control Module (PCM) has failed, it will need to be replaced. This is a relatively simple procedure that can often fix the problem. It is important to select the correct replacement PCM for the make and model of the Jeep.
Software Issues
Finally, software issues can cause Jeep Code U0140. If this is the case, the software should be updated to the latest version. This can often fix the problem, but it is important to follow the manufacturer’s instructions when updating the software.
Conclusion
Jeep Code U0140 can be a frustrating problem for Jeep owners. Fortunately, understanding the potential causes and solutions of Jeep Code U0140 can help owners identify and resolve the issue. By understanding the potential causes and solutions, Jeep owners can identify and resolve the problem quickly. With the right knowledge and tools, Jeep owners can confidently address this issue and keep their vehicles running smoothly.
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