MasterTuning Fault code dictionary (DTC)

4D23 — Exhaust-gas pressure sensor before particulate filter Hose plugged up

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: BMW
MeaningExhaust-gas pressure sensor before particulate filter Hose plugged up.
FamilyManufacturer-native code

Frequently asked questions

What does code 4D23 mean?

Exhaust-gas pressure sensor before particulate filter Hose plugged up. Exhaust-gas pressure sensor before particulate filter Hose plugged up.

Can I keep driving with code 4D23 active?

With caution: limp mode possible, have it checked soon

How do you fix code 4D23?

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.

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