Fault code description - ME-SFI - misfires - AD07.61-P-4000-11MA
| Misfire, damaging to TWC | ||
|---|---|---|
| 1 | Fault code | P2050 Sum (P0300) |
| (Fault code according to OBD) | P2051 Misfires on cylinder 1 (P0301) P2052 Misfire at cylinder 5 (P0305) P2053 Misfiring at cylinder 3 (P0303) P2054 Misfire at cylinder 6 (P0306) P2055 Misfire at cylinder 2 (P0302) P2056 Misfire at cylinder 4 (P0304) P2057 Misfire at cylinder 7 (P0307) P2058 Misfire at cylinder 11 (P0311) P2059 Misfire at cylinder 9 (P0309) P205A Misfire at cylinder 12 (P0312) P205B Misfire at cylinder 8 (P0308) P205C Misfire at cylinder 10 (P0310) |
|
| 2 | Fault storage | After expiry of test duration and fault |
| Actuation of engine diagnosis indicator lamp (EURO4) or CHECK ENGINE (MIL) |
The indicator lamp is actuated immediately | |
| 3 | Checking frequency | Continuous |
| 4 | Checked signal or status | Number of recognized combustion misfires |
| 5 | Fault setting conditions | |
| Limit value, TWC deteriorating | Maximum of 10 to 95 combustion misfires per cylinder bank within about 200 engine revolutions; the value is dependent on coolant temperature, motor speed and engine load according to the performance map (e.g. 10 misfires at operating temperature, 6000 RPM and maximum load, 66 misfires in idle without load) | |
| 6 | Check prerequisites |
|
| 7 | If too many misfires occur at a cylinder, the cylinder is cut off (cylinder selective fuel shutoff). Misfires through faults in the ECI ignition system If ignition does not take place misfiring occurs. If in addition to misfiring faults there are also ECI faults stored, then start the troubleshooting Begin ECI ignition system. ECI faults are not, however, always stored at the same time. If a cylinder does not fire (compare current ion current signals) then check line with the ignition trigger signals between ECI ignition module and ME-SFI [ME] control unit for discontinuity. Misfires due to fuel starvation If combustion misfires are recognized, another fault code P203A (P0460) is output if the level in the fuel tank is too low. This information indicates combustion misfires due to fuel starvation. A lack of fuel pressure can be the cause (e.g. if the fuel filter is clogged, fuel pump, fuel pump control unit or fuel pressure sensor defective). Misfiring because of miscellaneous causes Combustion misfires may be caused by many faults in the injection system. Usually in this case other component or function faults are stored, in addition to the misfire fault. The cause may also be due to faults in the engine mechanics. |