8 Liebherr diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.
Disclaimer: General reference information for trained, qualified technicians only. Codes and procedures vary by model, serial number and software version. Always follow the manufacturer's service manual and your site's safety procedures. Use at your own risk. Not affiliated with or endorsed by any manufacturer.
| Code | System | Symptom | Full fix |
|---|---|---|---|
| P1122-00 | Aftertreatment (SCR) | Dosing Failure. AdBlue/DEF is not being sprayed into the exhaust. | View fix |
| P2047-00 | Aftertreatment (SCR) | Limp Mode. DEF dosing stops immediately. | View fix |
| P204C-00 | Aftertreatment (SCR) | DEF Derate. Check Engine light on; AdBlue/DEF pressure fails to build; machine may limit RPM/torque. | View fix |
| P205C-00 | Aftertreatment (SCR) | Wait-to-Start. The machine may delay full power in cold weather. | View fix |
| P208E-00 | Aftertreatment (SCR) | Pump Failure. System won't prime. | View fix |
| P20BD-00 | Aftertreatment (SCR) | Winter Failure. DEF freezes in lines; machine won't dose. | View fix |
| P20E8-00 | Aftertreatment (SCR) | Severe Power Loss. Engine derates quickly; AdBlue pump not audible. | View fix |
| P20EE-00 | Aftertreatment (SCR) | Efficiency Alert. "SCR Catalyst Efficiency Below Threshold." | View fix |
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