All fuel injectors will wear out during use, and some malfunctions will occur. But most of the faults are minor faults, and some error codes will also appear. If we do not understand these Bosch diesel EFI high-pressure common-rail systems, it is just a small problem and it will consume a lot of time. Therefore, we understand some Bosch diesel EFI high-pressure common-rail systems, which is very important for us.
| Serial number | Fault Code | Description |
| 1 | 0 | The exhaust brake valve feedback does not match the ECU control command |
| 2 | P0016 | Relative position deviation of phase sensor and crankshaft sensor |
| 3 | P0045 | Open circuit of turbocharger actuator control line |
| 4 | P0046 | Overheating of the ECU internal drive module of the turbocharger actuator control line |
| 5 | P0047 | Supercharger actuator control wire is shorted to ground |
| 6 | P0048 | Supercharger actuator control line is shorted to high level |
| 7 | P0069 | Boost pressure sensor drift |
| 8 | P0071 | The ambient temperature sensor signal from CAN is invalid |
| 9 | P0072 | The output voltage of the ambient temperature sensor exceeds the lower limit (the wiring is short-circuited to the ground) |
| 10 | P0073 | The output voltage of the ambient temperature sensor exceeds the upper limit (open circuit or short circuit to high level) |
| 11 | P0087 | Fuel pressure is below the minimum limit |
| 12 | P0088 | Fuel pressure exceeds the maximum limit |
| 13 | P0097 | The intake air temperature sensor voltage is too low (the wiring is shorted to the ground) |
| 14 | P0098 | The intake air temperature sensor voltage is too high (open circuit or short circuit to high level) |
| 15 | P0100 | The uncorrected air mass flow signal measured by the air flow meter is too large or too small (open circuit or short circuit) |
| 16 | P0101 | The corrected air mass flow signal measured by the air flow meter is too large or too small |
| 17 | P0102 | Air mass flow meter negative drift |
| 18 | P0103 | Positive drift of air mass flow meter |
| 19 | P0104 | Air mass flow meter zero drift |
| 20 | P0110 | The connection of the additional air temperature sensor on the air mass flow meter is shorted or open |
| 21 | P0112 | The additional air temperature sensor on the air mass flow meter measured the temperature too low |
| 22 | P0113 | The additional air temperature sensor on the air mass flow meter measured the temperature too high |
| 23 | P0115 | The cooling water temperature signal from CAN is invalid |
| 24 | P0116 | Unreliable dynamic characteristics of water temperature sensor |
| 25 | P0117 | The output voltage of the cooling water temperature sensor is lower than the lower limit (the connection is short-circuited to the ground) |
| 26 | P0118 | The output voltage of the cooling water temperature sensor is higher than the upper limit (open circuit or short circuit to high level) |
| 27 | P0122 | The output voltage of accelerator pedal potentiometer 1 exceeds the lower limit |
| 28 | P0123 | The output voltage of accelerator pedal potentiometer 1 exceeds the upper limit |
| 29 | P0128 | The static characteristics of the water temperature sensor cannot be trusted |
| 30 | P0182 | The output voltage of the fuel temperature sensor is too low (the wiring is short-circuited to the ground) |
| 31 | P0183 | The output voltage of the fuel temperature sensor is too high (open circuit or short circuit to high level) |
| 32 | P0191 | The rail pressure sensor drifts too much forward |
| 33 | P0192 | The output voltage of the rail pressure sensor is higher than the lower limit (the wiring is shorted to the ground) |
| 34 | P0193 | The output voltage of the rail pressure sensor is higher than the upper limit (open circuit or short circuit to high level) |
| 35 | P0194 | Rail pressure sensor drifts too much in the negative direction |
| 36 | P0195 | The oil temperature signal transmitted from CAN is invalid |
| 37 | P0197 | The output voltage of the oil temperature sensor is lower than the lower limit |
| 38 | P0198 | The output voltage of the oil temperature sensor is higher than the upper limit |
| 39 | P02011 | Cylinder injector open circuit |
| 40 | P02022 | Cylinder injector open circuit |
| 41 | P02033 | Cylinder injector open circuit |
| 42 | P02044 | Cylinder injector open circuit |
| 43 | P02055 | Cylinder injector open circuit |
| 44 | P02066 | Cylinder injector open circuit |
| 45 | P0222 | The output voltage of accelerator pedal potentiometer 2 exceeds the lower limit |
| 46 | P0223 | The output voltage of accelerator pedal potentiometer 2 exceeds the upper limit |
| 47 | P0234 | The actual boost pressure is too large relative to the control target |
| 48 | P0235 | The boost pressure signal from CAN is invalid |
| 49 | P0237 | The output voltage of the boost pressure sensor exceeds the lower limit (the wiring is short-circuited to the ground) |
| 50 | P0238 | The output voltage of the boost pressure sensor exceeds the upper limit (open circuit or short circuit to high level) |
| 51 | P0251 | The metering unit control line is open |
| 52 | P0252 | The internal driving circuit of the ECU of the metering unit is overheated |
| 53 | P0253 | The control line of the metering unit is shorted to ground |
| 54 | P0254 | The metering unit control line is shorted to high level |
| 55 | P025C | No use |
| 56 | P025D | No use |
| 57 | P0261 | 1 cylinder injector low end and high end short circuit |
| 58 | P0262 | 1 cylinder injector low end and high level short circuit |
| 59 | P0263 | 1 cylinder injector other errors |
| 60 | P0264 | Short circuit between low end and high end of the 2-cylinder injector |
| 61 | P0265 | The low end of the 2-cylinder injector is shorted to the high level |
| 62 | P0266 | 2 cylinder injector other errors |
| 63 | P0267 | Short circuit between low end and high end of the 3-cylinder injector |
| 64 | P0268 | Short circuit between the low end of the 3-cylinder injector and the high level |
| 65 | P0269 | 3 cylinder injector other errors |
| 66 | P0270 | 4-cylinder injector low-end and high-end short circuit |
| 67 | P0271 | 4-cylinder injector low-end and high-level short circuit |
| 68 | P0272 | 4 cylinder injector other errors |
| 69 | P0273 | Short circuit between low end and high end of 5-cylinder injector |
| 70 | P0274 | Short circuit between the low end of the 5-cylinder injector and the high level |
| 71 | P0275 | 5 cylinder injector other errors |
| 72 | P0276 | Short circuit between low end and high end of 6-cylinder injector |
| 73 | P0277 | 6-cylinder injector low-end and high-level short circuit |
| 74 | P0278 | 6 cylinder injector other errors |
| 75 | P0299 | The actual boost pressure is too small relative to the control target |
| 76 | P0300 | Multi-cylinder misfire |
| 77 | P0301 | Misfire in the first cylinder |
| 78 | P0302 | Misfire in the second cylinder |
| 79 | P0303 | Misfire in the third cylinder |
| 80 | P0304 | Misfire in the fourth cylinder |
| 81 | P0305 | Misfire in the fifth cylinder |
| 82 | P0306 | 6th cylinder misfire |
| 83 | P0335 | No crankshaft sensor signal |
| 84 | P0336 | Incorrect crankshaft sensor signal |
| 85 | P0340 | No phase sensor signal |
| 86 | P0341 | Wrong phase sensor signal |
| 87 | P0380 | ECU does not request the glow plug to work, but the glow plug actually works |
| 88 | P0382 | ECU requests the glow plug to work, but the glow plug does not actually work |
| 89 | P0383 | The control wire of ECU to glow plug is shorted to ground |
| 90 | P0384 | The control line of ECU to glow plug is shorted to high level |
| 91 | P0401 | The actual intake of fresh air is greater than the target intake set by the EGR system |
| 92 | P0402 | The actual intake of fresh air is less than the target intake set by the EGR system |
| 93 | P0403 | The ECU internal drive module of the EGR valve actuator control line is overheated |
| 94 | P0404 | EGR valve actuator control line is open |
| 95 | P0405 | The EGR valve position sensor voltage exceeds the lower limit (the wiring is short-circuited to the ground) |
| 96 | P0406 | The EGR valve position sensor voltage exceeds the upper limit (open circuit or short circuit to high level) |
| 97 | P0475 | Exhaust brake valve control line is open |
| 98 | P0476 | ECU internal drive module for exhaust brake valve control line |
| 99 | P0477 | Exhaust brake valve control line is shorted to ground |
| 100 | P0478 | The exhaust brake valve control line is shorted to high level |
