3121 — Mechanical fault (small valve for closing the clutch)
Severity: Warning
Can you drive? With caution: limp mode possible, have it checked soon
Make: MAN
| Meaning | Mechanical fault (small valve for closing the clutch). |
| System | AST |
| Family | Manufacturer-native code |
Frequently asked questions
What does code 3121 mean?
Mechanical fault (small valve for closing the clutch). Mechanical fault (small valve for closing the clutch). (System: AST)
Can I keep driving with code 3121 active?
With caution: limp mode possible, have it checked soon
How do you fix code 3121?
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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Where to get it fixed
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