Diagnostic flash codes for Isuzu engines 4HK1 and 4JJ1
| Fault code | Flash code | DTCs description |
| P0016 | 16 | inconsistency of crankshaft position sensor’s signal and camshaft. |
| P0045 | 33 | |
| P0079 | 38 | |
| P0080 | 38 | |
| P0087 | 225 | overpressure in the fuel distribution line |
| P0088 | 118 | overpressure in the fuel distribution line |
| P0089 | 151 | overpressure in the fuel distribution line |
| P0091 | 247 | defective gauge or sensor circuit fuel adjustment |
| P0092 | 247 | defective gauge or sensor circuit fuel adjustment |
| P0093 | 227 | low pressure in the fuel distribution line |
| P0101 | 92 | mass air flow sensor voltage does not match the calculated value |
| P0102 | 91 | mass air flow sensor voltage out of range |
| P0103 | 91 | mass air flow sensor voltage out of range |
| P0107 | 32 | mass air flow sensor voltage does not match the calculated value |
| P0108 | 32 | mass air flow sensor voltage does not match the calculated value |
| P0112 | 22 | |
| P0113 | 22 | |
| P0116 | 23 | Faulty coolant temperature sensor |
| P0117 | 23 | Coolant temperature sensor out of range |
| P0118 | 23 | Coolant temperature sensor out of range |
| P0122 | 43 | |
| P0123 | 43 | |
| P0182 | 211 | Fuel temperature sensor out of range |
| P0183 | 211 | Fuel temperature sensor out of range |
| P0192 | 245 | Fuel pressure sensor out of range |
| P0193 | 245 | Fuel pressure sensor out of range |
| P0201 | 271 | Injector circuit malfunction 1 |
| P0202 | 271 | Injector circuit malfunction 2 |
| P0203 | 271 | Injector circuit malfunction 3 |
| P0204 | 271 | Injector circuit malfunction 4 |
| P0217 | 542 | excess motor temperature |
| P0219 | 543 | exceeding of the speed rotation of the INTERNAL-COMBUSTION ENGINE |
| P0234 | 42 | excess pressure adjuster |
| P0299 | 65 | low boost pressure |
| P0335 | 15 | missing crankshaft position sensor signal |
| P0336 | 15 | crankshaft sensor malfunction or malfunction of the handwheel |
| P0340 | 14 | no signal camshaft sensor |
| P0341 | 14 | camshaft sensor malfunction or camshaft |
| P0380 | 66 | ignition heater circuit out of range |
| P0381 | 66 | control circuit test light candles glow out of range |
| P0401 | 93 | |
| P0404 | 45 | |
| P0409 | 44 | |
| P0426 | 143 | |
| P0427 | 48 | |
| P0428 | 48 | |
| P042B | 145 | |
| P042C | 49 | |
| P042D | 49 | |
| P0477 | 46 | Relay mountain chain brake is out of range |
| P0478 | 46 | Relay mountain chain brake is out of range |
| P0500 | 25 | faulty speed sensor (NQR series), ABS (NPR series) |
| P0502 | 25 | the chain is outside the range of the speed sensor (NQR series), ABS (NPR series) |
| P0503 | 25 | the chain is outside the range of the speed sensor (NQR series), ABS (NPR series) |
| P0560 | 155 | |
| P0563 | 35 | excess voltage of the on-board circuit |
| P0601 | 53 | malfunction MANAGEMENT UNIT DWS |
| P0602 | 154 | incorrect data in the INTERNAL-COMBUSTION ENGINE |
| P0604 | 153 | malfunction MANAGEMENT UNIT DWS |
| P0606 | 51 | malfunction MANAGEMENT UNIT DWS |
| P060B | 36 | malfunction MANAGEMENT UNIT DWS |
| P0633 | 176 | incorrect data in the INTERNAL-COMBUSTION ENGINE |
| P0638 | 61 | |
| P0641 | 55 | |
| P0650 | 77 | malfunction indicator lamp circuit. CHECK ENGINE |
| P0651 | 56 | |
| P0685 | 416 | malfunction ECM relay |
| P0687 | 416 | malfunction ECM relay |
| P0697 | 57 | |
| P1093 | 227 | low pressure in the fuel line |
| P1261 | 34 | open circuit 1 nozzles (1 and 4 cylinders) |
| P1262 | 34 | open circuit 2 nozzles (2 and 3 cylinders) |
| P1404 | 45 | |
| P1455 | 132 | |
| P1471 | 149 | |
| P161B | 179 | |
| P1621 | 54 | incorrect data in the INTERNAL-COMBUSTION ENGINE |
| P1664 | 76 |
