4178 — Exhaust gas temperature upstream of particulate filter Exhaust gas temp. signal implausible
Severity: Warning
Can you drive? With caution: limp mode possible, have it checked soon
Make: BMW
| Meaning | Exhaust gas temperature upstream of particulate filter Exhaust gas temp. signal implausible. |
| Family | Manufacturer-native code |
Frequently asked questions
What does code 4178 mean?
Exhaust gas temperature upstream of particulate filter Exhaust gas temp. signal implausible. Exhaust gas temperature upstream of particulate filter Exhaust gas temp. signal implausible.
Can I keep driving with code 4178 active?
With caution: limp mode possible, have it checked soon
How do you fix code 4178?
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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