U0301
Software Incompatibility with ECM/PCM
1992-1996 BMW 318is E36 1.8L I4 🇨🇦
High SeverityNetwork
Description
The data protocol or software version from the ECM/PCM is incompatible with other vehicle modules.
Symptoms
- Check Engine Light
- Transmission shift issues
- Other modules reporting ECM data errors
- Systems not responding to ECM commands
Common Causes
- ECM software version mismatch
- ECM reprogramming incomplete
- Wrong ECM software loaded
- ECM hardware revision mismatch
Diagnostic Steps
- Check ECM software version
- Compare to required version
- Reprogram ECM with correct software
- Check for TSBs
- Verify ECM hardware part number matches software
Repair Notes
Reprogram ECM/PCM with correct calibration. Verify correct part number and software version.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0301 on Other Vehicles
Common Questions
What does code U0301 mean on a 1992-1996 BMW 318is E36?
U0301 stands for "Software Incompatibility with ECM/PCM". The data protocol or software version from the ECM/PCM is incompatible with other vehicle modules.
What are the symptoms of U0301 on a BMW 318is E36?
Common symptoms of U0301 include: Check Engine Light, Transmission shift issues, Other modules reporting ECM data errors, Systems not responding to ECM commands.
What causes U0301 on a 1992-1996 BMW 318is E36?
Common causes of U0301 include: ECM software version mismatch, ECM reprogramming incomplete, Wrong ECM software loaded, ECM hardware revision mismatch.