When it comes to diagnosing issues with Jeep vehicles, one of the most common diagnostic trouble codes (DTC) is U1267. This code is triggered when the Jeep’s Transmission Control Module (TCM) detects problems with both the Controller Area Network (CAN) C and CAN DPT circuits. This DTC is set when the TCM is unable to receive data from the Electronic Shift Module (ESM) to accurately determine the shifter position. To ensure proper Jeep performance, it’s important to identify the causes and solutions of the U1267 code.
Causes and Solutions of Jeep Code U1267
| Cause | Solution |
|---|---|
| CAN C (+) circuit open, short to ground, or short to voltage | Check and repair the wiring issue |
| CAN C (-) circuit open, short to ground, or short to voltage | Check and repair the wiring issue |
| CAN DPT (+) circuit open, short to ground, or short to voltage | Check and repair the wiring issue |
| CAN DPT (-) circuit open, short to ground, or short to voltage | Check and repair the wiring issue |
| Electronic Shift Module (ESM) | Replace the ESM |
Jeep Code U1267 is a diagnostic trouble code (DTC) that is triggered when the Transmission Control Module (TCM) detects issues in both the Controller Area Network (CAN) C and CAN DPT circuits. When this code sets, it is because the TCM is unable to receive data from the Electronic Shift Module (ESM) to determine the shifter position. To ensure a Jeep vehicle is running optimally, it’s important to identify the causes and solutions of the U1267 code. Common causes of this code include wiring issues and a faulty ESM, and the solutions range from checking and repairing the wiring to replacing the ESM. With the right knowledge and tools, it is possible to diagnose and repair this issue.
CAN C (+) and CAN C (-) Circuit Problems
When the CAN C (+) and CAN C (-) circuits are malfunctioning, the U1267 code will be triggered. This is usually due to an open circuit, a short to ground, or a short to voltage in either of the circuits. In all these cases, the best solution is to check and repair the wiring issue.
CAN DPT (+) and CAN DPT (-) Circuit Problems
The CAN DPT (+) and CAN DPT (-) circuits can also cause the U1267 code. When the wiring in these circuits is faulty, the TCM will not be able to receive data from the ESM, resulting in the code being set. To fix this issue, the wiring must be checked and repaired.
Electronic Shift Module (ESM) Issues
Another common cause of Jeep Code U1267 is a faulty Electronic Shift Module (ESM). When the ESM is malfunctioning, the TCM will be unable to receive the data it needs to determine the shifter position, resulting in the code being set. To fix this issue, the ESM must be replaced.
Conclusion
Jeep Code U1267 is one of the most common diagnostic trouble codes that is set when the Transmission Control Module (TCM) is unable to receive data from the Electronic Shift Module (ESM). Common causes of this code include wiring issues in the CAN C and CAN DPT circuits, and a faulty ESM. The solutions to this code range from checking and repairing the wiring to replacing the ESM. By understanding the causes and solutions of Jeep Code U1267, it is possible to correctly diagnose and fix this issue.
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