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2021 Mercedes-Benz GLB250 4Matic 2.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Hard Misfire cyl #3
This 4 cylinder turbo got towed-in, it's starts and runs but has a constant hard misfire/MIL/engine shaking. It's worse at idle but continue to misfire at all engine speeds. Crankcase pressure measured at idle (-11 to -12" WC) (27-30 mbar) I suspected...
Summary posted 5/16/2023
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Related Documents & Media | VIN | W1N4N4HB2M |
| Engine | 2.0 L / 4 cyl / GAS |
| Trans | 8-speed Automatic (Electronic) |
| Delivery | Fuel Injection / GDI engine code 260.920 |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Hard Misfire Cyl #3 |
| Occurs | Always, Idle |
| Misc. | It's a Gla250 (Not Glb250) |
Trouble Codes
| 00303 | |
| 77 | Irregular mixture formation cyl 3. The commanded position cant be reached |
| 85 | Misfire detected cyl 3 |
| 94 | Idle speed control malfunction during cold start. There is an unecpected instruction |
| P050A | Cold Start Idle Air Control System Performance Problem |
| P219E |
Message Closed w/Summary
Vehicle Data
2021 Mercedes-Benz GLB250 4Matic
| VIN | W1N4N4HB2M |
| Engine | 2.0 L / 4 cyl / GAS |
| Trans | 8-speed Automatic (Electronic) |
| Delivery | Fuel Injection / GDI engine code 260.920 |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Hard Misfire Cyl #3 |
| Occurs | Always, Idle |
| Misc. | It's a Gla250 (Not Glb250) |
Trouble Codes
| 00303 | |
| 77 | Irregular mixture formation cyl 3. The commanded position cant be reached |
| 85 | Misfire detected cyl 3 |
| 94 | Idle speed control malfunction during cold start. There is an unecpected instruction |
| P050A | Cold Start Idle Air Control System Performance Problem |
| P219E |
Video