- CHECK THE CAN CIRCUIT FOR SHORTS TO GROUND OR OPEN WIRES
- CHECK THE FUEL LEVEL SENSOR
- CHECK THE FUEL LEVEL SIGNAL CIRCUIT
- CHECK THE SENSOR GROUND CIRCUIT FOR AN OPEN CIRCUIT
- REPLACE TIPM
- REPLACE PCM
The Chrysler U1403 Code is a diagnostic code that is triggered when the PCM (Powertrain Control Module) detects an implausible fuel level message. This code can cause a range of issues, from poor engine performance to the vehicle stalling. Knowing the underlying causes and possible solutions of this code can help you determine the cause of the issue and resolve it quickly. The key to diagnosing this code is to determine the root cause and identify the most effective solution.
Causes and Solutions of Chrysler U1403 Code
| Causes | Solutions |
|---|---|
| CAN Circuit Open or Shorted | Check the CAN Circuit for Shorts to Ground or Open Wires |
| Fuel Level Sensor | Check the Fuel Level Sensor |
| Fuel Level Signal Circuit Open | Check the Fuel Level Signal Circuit |
| Sensor Ground Circuit Open | Check the Sensor Ground Circuit for an Open Circuit |
| Totally Integrated Power Module (TIPM) | Replace TIPM |
| Powertrain Control Module (PCM) | Replace PCM |
CAN Circuit Open or Shorted
The first potential cause of the Chrysler U1403 Code is an open or shorted CAN (Controller Area Network) circuit, which is a high-speed communication bus that enables efficient data transfer between computers in a vehicle. To diagnose this issue, you need to check the CAN circuit for shorts to ground or open wires.
Fuel Level Sensor
Another possible cause of this code is a faulty fuel level sensor. The fuel level sensor is responsible for sending a signal to the PCM indicating the fuel level in the tank. To diagnose this issue, you need to check the fuel level sensor.
Fuel Level Signal Circuit Open
If the fuel level sensor is working properly, then the issue may be a broken fuel level signal circuit. To diagnose this issue, you need to check the fuel level signal circuit for any signs of damage.
Sensor Ground Circuit Open
The last potential cause of the Chrysler U1403 Code is an open sensor ground circuit. To diagnose this issue, you need to check the sensor ground circuit for an open circuit.
Totally Integrated Power Module (TIPM)
If all of the above-mentioned causes have been ruled out, then the issue is likely with the Totally Integrated Power Module (TIPM). This module is responsible for controlling several systems in the vehicle, such as the fuel pump and injectors. To fix this issue, you need to replace the TIPM.
Powertrain Control Module (PCM)
The last potential cause of the U1403 Code is a faulty Powertrain Control Module (PCM). To diagnose and fix this issue, you need to replace the PCM.
Conclusion
In conclusion, the Chrysler U1403 Code is a diagnostic code that is triggered when the PCM detects an implausible fuel level message. Knowing the underlying causes and possible solutions of this code can help you determine the cause of the issue and resolve it quickly. The key to diagnosing this code is to determine the root cause and identify the most effective solution. Common causes of this code include an open or shorted CAN circuit, a faulty fuel level sensor, a broken fuel level signal circuit, an open sensor ground circuit, a faulty TIPM, and a faulty PCM. By following the diagnostic steps outlined above, you should be able to diagnose and fix the Chrysler U1403 Code.
https://www.youtube.com/watch?v=sOjrkAodgKs