Caterpillar C-9 fault code list

No c9 will be different. What code are you having?

 

Here's a list of flash codes. This is all the codes for HEUI and EUI, so there are a lot there wont apply to your engine, but all the C9 HUEI codes should be on it.

FC - DIAGNOSTIC CODE DESCRIPTION
00 - QUICKSTOP OCCURRENCE
00 - INLET AIR SHUTOFF SHUTDOWN
00 - RATED ENGINE POWER SPECIAL INSTRUCTIONS
00 - BRAKE PEDAL SWITCH #1 FAULT
00 - BRAKE PEDAL SWITCH #2 FAULT
00 - OUTSIDE AIR TEMP SENSOR VOLTAGE HIGH
00 - OUTSIDE AIR TEMP SENSOR VOLTAGE LOW
00 - OUTSIDE AIR TEMP DATA LOST
01 - IDLE SHUTDOWN OVERRIDE
12 - INVALID COOLANT LEVEL
12 - COOLANT LEVEL SENSOR VOLTAGE HIGH
12 - COOLANT LEVEL SENSOR VOLTAGE LOW
13 - FUEL TEMP VOLTAGE HIGH
13 - FUEL TEMP VOLTAGE LOW
13 - THEFT DETERRENT ACTIVE
13 - THEFT DETERRENT ACTIVE WITH ENGINE CRANKING
14 - RETARDER SOLENOID LOW/HIGH VOLTAGE LOW
14 - RETARDER SOLENOID LOW/HIGH VOLTAGE HIGH
14 - RETARDER SOLENOID MED/HIGH VOLTAGE LOW
14 - RETARDER SOLENOID MED/HIGH VOLTAGE HIGH
15 - INJECTION ACTUATION PRESSURE - ERATIC SIGNAL
15 - INJECTION ACTUATION PRESSURE - VOLTAGE HIGH
15 - INJECTION ACTUATION PRESSURE - VOLTAGE LOW
16 - HIGH EXHAUST GAS TEMP - DERATE
16 - VERY HIGH EXHAUST GAS TEMP - DERATE
17 - EXCESSIVE ACTUATION PRESSURE
18 - INJECTION ACTUATION PRESSURE - OUTPUT FAULT
21 - 5 VOLT SUPPLY VOLTAGE HIGH
21 - 5 VOLT SUPPLY VOLTAGE LOW
21 - 8 VOLT SUPPLY VOLTAGE HIGH
21 - 8 VOLT SUPPLY VOLTAGE LOW
24 - OIL PRESSURE SENSOR VOLTAGE HIGH
24 - OIL PRESSURE SENSOR VOLTAGE LOW
25 - BOOST PRESSURE SENSOR VOLTAGE HIGH
25 - BOOST PRESSURE SENSOR VOLTAGE LOW
25 - BOOST PRESSURE NOT RESPONDING
26 - BAROMETRIC PRESSURE VOLTAGE HIGH
26 - BAROMETRIC PRESSURE VOLTAGE LOW
26 - BAROMETRIC PRESSURE SIGNAL RATE OF CHANGE
27 - COOLANT TEMPERATURE SENSOR VOLTAGE HIGH
27 - COOLANT TEMPERATURE SENSOR VOLTAGE LOW
28 - ACCELERATOR PEDAL POSITION OUT OF CALIBRATION
29 - PTO THROTTLE SIGNAL INVALID
29 - PTO THROTTLE SIGNAL CALIBRATION
31 - LOSS OF WHEEL-BASED VEHICLE SPEED SIGNAL
32 - ACCELERATOR PEDAL POSITION INVALID
34 - PRIMARY ENGINE SPEED LOSS OF SIGNAL
34 - SECONDARY ENGINE SPEED LOSS OF SIGNAL
35 - ENGINE OVERSPEED WARNING
36 - VEHICLE SPEED SIGNAL INVALID
36 - VEHICLE SPEED SIGNAL OUT OF RANGE
36 - VEHICLE SPEED SIGNAL RATE OF CHANGE
37 - FUEL PRESSURE SENSOR - VOLTAGE HIGH
37 - FUEL PRESSURE SENSOR - VOLTAGE LOW
38 - INTAKE MANIFOLD AIR TEMPERATURE SENSOR VOLTAGE HIGH
38 - INTAKE MANIFOLD AIR TEMPERATURE SENSOR VOLTAGE LOW
39 - NJECTION ACTUATION PRESSURE SYSTEM FAULT
41 - VEHICLE OVERSPEED WARNING
42 - PRIMARY TO SECONDARY ENGINE SPEED SIGNAL CALIBRATION
42 - ENGINE SPEED SIGNAL CALIBRATION NOT PERFORMED
44 - SECONDAY FUEL LEVEL SENSOR - VOLTAGE HIGH
44 - SECONDAY FUEL LEVEL SENSOR - VOLTAGE LOW
46 - LOW OIL PRESSURE WARNING
46 - VERY LOW OIL PRESSURE 46
47 - IDLE SHUTDOWN OCCURRENCE
47 - PTO SHUTDOWN OCCURRENCE
49 - INLET AIR HEATER - CURRENT LOW
49 - INLET AIR HEATER - CURRENT HIGH
51 - EXCESSIVE ECM BATTERY POWER
51 - LOW ECM BATTERY POWER
51 - INTERMITTENT BATTERY POWER TO THE ECM
55 - NO DIAGNOSTIC CODE DETECTED
56 - CHECK TRANSMISSION CUSTOMER PARAMETERS
56 - CHECK CUSTOMER OR SYSTEM PARAMETERS
58 - J1939 DATA INCORRECT
58 - J1939 DEVICE NOT RESPONDING
59 - ENGINE SOFTWARE INCORRECT
61 - HIGH COOLANT TEMPERATURE WARNING
61 - VERY HIGH COOLANT TEMPERATURE
62 - LOW COOLANT LEVEL WARNING
62 - VERY LOW COOLANT LEVEL
63 - LOW FUEL PRESSURE WARNING
63 - LOW CRANKING FUEL PRESSURE WARNING
62 - LOW COOLANT LEVEL WARNING (LESS THAN 6 ENGINE HOURS)
64 - HIGH INTAKE MANIFOLD AIR TEMPERATURE WARNING
64 - VERY HIGH INTAKE MANIFOLD AIR TEMPERATURE WARNING
65 - HIGH FUEL TEMPERATURE WARNING
66 - AUXILIARY OUTPUT #06 CURRENT LOW
66 - AUXILIARY OUTPUT #06 CURRENT HIGH
67 - AUXILIARY OUTPUT #07 CURRENT LOW
67 - AUXILIARY OUTPUT #07 CURRENT HIGH
68 - TRANSMISSION NOT RESPONDING
71 - IGNITION KEY SWITCH FAULT 71
72 - CYLINDER #1 INJECTOR CURRENT LOW
72 - CYLINDER #1 INJECTOR CURRENT HIGH
72 - CYLINDER #2 INJECTOR CURRENT HIGH
72 - CYLINDER #2 INJECTOR CURRENT LOW
73 - CYLINDER #3 INJECTOR CURRENT LOW
73 - CYLINDER #3 INJECTOR CURRENT HIGH
73 - CYLINDER #4 INJECTOR CURRENT LOW
73 - CYLINDER #4 INJECTOR CURRENT HIGH
74 - CYLINDER #5 INJECTOR CURRENT LOW
74 - CYLINDER #5 INJECTOR CURRENT HIGH
74 - CYLINDER #6 INJECTOR CURRENT LOW
74 - CYLINDER #6 INJECTOR CURRENT HIGH
92 - INTAKE VALVE ACTUATOR #1 CURRENT LOW
92 - INTAKE VALVE ACTUATOR #1 CURRENT HIGH
92 - INTAKE VALVE ACTUATOR #1 NOT RESPONDING
92 - INTAKE VALVE ACTUATOR #2 CURRENT LOW
92 - INTAKE VALVE ACTUATOR #2 CURRENT HIGH
92 - INTAKE VALVE ACTUATOR #2 NOT RESPONDING
93 - INTAKE VALVE ACTUATOR #3 CURRENT LOW
93 - INTAKE VALVE ACTUATOR #3 CURRENT HIGH
93 - INTAKE VALVE ACTUATOR #3 CURRENT NOT RESPONDING
93 - INTAKE VALVE ACTUATOR #4 CURRENT LOW
93 - INTAKE VALVE ACTUATOR #4 CURRENT HIGH
93 - INTAKE VALVE ACTUATOR #4 CURRENT NOT RESPONDING
94 - INTAKE VALVE ACTUATOR #5 CURRENT LOW
94 - INTAKE VALVE ACTUATOR #5 CURRENT HIGH
94 - INTAKE VALVE ACTUATOR #5 CURRENT NOT RESPONDING
94 - INTAKE VALVE ACTUATOR #6 CURRENT LOW
94 - INTAKE VALVE ACTUATOR #6 CURRENT HIGH
94 - INTAKE VALVE ACTUATOR #6 CURRENT NOT RESPONDING
95 - LOW INTAKE VALVE ACTUATION SYSTEM OIL PRESSURE
95 - INTAKE VALVE ACTUATION OIL PRESSURE VOLTAGE HIGH
95 - INTAKE VALVE ACTUATION OIL PRESSURE VOLTAGE LOW
97 - INTAKE VALVE ACTUATION SYSTEM OIL PRESSURE SOLENOID CURRENT LOW
97 - INTAKE VALVE ACTUATION SYSTEM OIL PRESSURE SOLENOID CURRENT HIGH
97 - INTAKE VALVE ACTUATION SYSTEM OIL PRESSURE NOT RESPONDING
98 - ENGINE COOLANT DIVERTER SOLENOID CURRENT LOW
98 - ENGINE COOLANT DIVERTER SOLENOID CURRENT HIGH

 

BTW, Cat flash codes are fairly consistent across any engine from the PEEC right up until they stopped using flash codes. Each engine had it's own set of fault codes that it uses (none of them use them all), but engines that have the same flash code have the same fault description for that code. For example, flash code 24 is an oil pressure sensor fault, no matter what engine.

If you can't find a specific flash code for your engine, but found that same flash code for another Cat engine, chances are that it's the same fault description.

 

The codes tend to line up across most engines anymore. The engineers association did this to make it easier fore technicians.