4390 — Boost Air Temperature Sensor - Short Circuit to B+
Severity: Warning
Can you drive? With caution: limp mode possible, have it checked soon
Make: BMW
| Meaning | Boost Air Temperature Sensor - Short Circuit to B+. |
| Family | Manufacturer-native code |
Frequently asked questions
What does code 4390 mean?
Boost Air Temperature Sensor - Short Circuit to B+. Boost Air Temperature Sensor - Short Circuit to B+.
Can I keep driving with code 4390 active?
With caution: limp mode possible, have it checked soon
How do you fix code 4390?
Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.
Need help with this fault?
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Where to get it fixed
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