Diagnostic Mode 03 - Read DTC Memory
Diagnostic Mode 03 makes it possible to read emissions-related faults (confirmed DTCs: faults which have activated the MIL) in the ECM and in the TCM.
When the ECM recognizes an emission related fault it turns on the MIL or if a Electronic Throttle Malfunction is recognized, the ECM turns on the EPC -- which are both located in the instrument cluster.
The DTC's are sorted by SAE code with the DTC tables consisting of a 5 digit alpha-numeric value.
NOTE:
Depending on scan tool and protocol used, Diagnostic Mode 03 and the information provided may be referred to by a different name.
The following tables provide a breakdown and explanation of the DTC code.
P Codes
| Component group | |||||
| P | x | x | x | x | DTC for the drivetrain |
| Norm-Code | |||||
| P | 0 | x | x | x | Trouble codes defined by SAE with specified malfunction texts |
| P | 1 | x | x | x | Additional emission relevant DTCs provided by the manufacturer |
| P | 2 | x | x | x | DTCs defined by SAE with specified texts, from MY 2000 |
| P | 3 | x | x | x | Additional emission relevant DTCs provided by the manufacturer from MY 2000 |
| Component group | |||||
| Repair group | |||||
| P | x | 0 | x | x | Fuel and air mixture and additional emission regulations |
| P | x | 1 | x | x | Fuel and air ratios |
| P | x | 2 | x | x | Fuel and air ratios |
| P | x | 3 | x | x | Ignition system |
| P | x | 4 | x | x | Additional exhaust system |
| P | x | 5 | x | x | Speed and idle control |
| P | x | 6 | x | x | Control module and output signals |
| P | x | 7 | x | x | Transmission |
| P | x | 8 | x | x | Transmission |
| P | x | 9 | x | x | Control modules, input and output signals |
U Codes
| Component group | |||||
| U | x | x | x | x | DTC for network (CAN bus) |
| Norm-Code | |||||
| U | 0 | x | x | x | Trouble codes defined by SAE with specified malfunction texts |