UM-0086-A2
CANgate User’s Manual
Page 42
DTCs (Fault Codes)
OBD-II Diagnostic Trouble Codes (DTCs) are normally written as a letter followed by four decimal digits. The letter describes
the category:
P
(powertrain),
B
(body),
C
(chassis) or
U
(network). For example:
P0118
- Engine Coolant Temperature Circuit High Input
P0203
- Injector Circuit Malfunction - Cylinder 3
U0003
- High Speed CAN Communication Bus (+) Open
When a DTC is returned it is encoded as a 16-bit value, as follows:
b15..14 – first character (00=P, 01=C, 10=B, 11=U)
b13..12 – second character (0-3)
b11..8 – third character (0-9)
b7..4 – fourth character (0-9)
b3..0 – fifth character (0-9)
