During the recent polar vortex and unusually cold weather, several customers reported encountering a ‘limp mode’ condition occasionally upon first starting their vehicle after sitting in the cold.
Condition:
Customers with this issue described the problem such that upon starting the vehicle and backing up, the EPC light would come on and the engine would bog. Restarting the engine would result in normal operation.
Fault Code:
Customers with this condition reported the following fault code:
P1388 - 6372 - Control Module Malfunction - DBW Throttle Monitoring
Example Threads:
- APR v2.2 occasionally going into limp mode
- EPC light comes on when going in reverse and car dies after shifting into first gear
The Fix:
Our engineering team was able to acquire a vehicle experiencing this issue and was able to duplicate the issue, identify what the issue was and resolve the issue. After several weeks of beta testing, customers running the updated software reported the issue was resolved.
How to get the update:
The process of updating the files is lengthy and not all ECU box codes exhibited the same behavior. As such, I will take requests and have engineering update files one by one as the requests come in. Eventually all files going forward will be updated. Please send me your vin ONLY if you’ve experienced this issue so we can update affected codes first, before updating the rest.
List of updated ECU Box codes and Revisions (I'll keep this updated):
- 8K0907551A S0001
- 8K0907551A S0002
- 8K0907551B S0002
- 8K0907551D S0001
- 8K0907551D S0003
- 4F1910551D S0010
- 4L0910551Q S0030
List of currently incomplete requested ECU Box codes and Revisions (I'll keep this updated):
None
Conclusion:
I want to thank all of our customers who brought this information forward to us and helped us resolve the issue. Thank you for your patience during the whole process and Go APR!
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