Troubleshooting

Main Code Subcode Meaning Applied Clutches
13 12 Battery Voltage to the ECU too low
13 13 Battery Voltage to the ECU too low (medium)
13 23 Battery Voltage to the ECU too high
14 12 Oil level senso failed low
14 23 Oil level senso failed high (not used)
21 12 Throttle position sensor failed high and ECU signals a throttle default value
21 23 Throttle position sensor failed low and ECU signals throttle default value
22 14 Failed Sensor - Engine Speed
22 15 Failed Sensor - Turbine Speed
22 16 Failed Sensor - Output Speed
23 12 Primary shift selector fault -- a "cateye"type display may occur
23 13 Primary shift selector mode function fault. Mode change not permitted
23 14 Secondary shift selector fault -- a "cateye"type display may occur
23 15 Secondary shift selector mode function fault. Mode change not permitted
23 16 Shift selector display line fault
24 12 Sump fluid temperature cold
24 23 Sump fluid temperature hot
25 0 Output speed sensor, detected at zero speed, Low range C3, C6
25 11 Output speed sensor, detected at zero speed, 1st range C1, C5
25 22 Output speed sensor, detected at zero speed, 2nd range C1, C4
25 33 Output speed sensor, detected at zero speed, 3rd range C1, C3
25 44 Output speed sensor, detected at zero speed, 4th range C1, C2
25 55 Output speed sensor, detected at zero speed, 4th range C2, C3
25 66 Output speed sensor, detected at zero speed, 6th range C2, C4
25 77 Output speed sensor, detected at zero speed, Reverse C2, C5
26 0 Throttle source not detected
26 11 Engine coolant source not detected
32 0 C3 switch open in low range (MD3070 or HD4070 only)
32 33 C3 switch open in third range
32 55 C3 switch open in fifth range
32 77 C3 switch open in reverse range
33 12 Sump oil temperature sensor failed low
33 23 Sump oil temperature sensor failed high
34 12 Factory calibration compatibility number wrong
34 13 Factory Calibration checksum
34 14 Power off block checksum
34 15 Diagnostic queue block checksum
34 16 Real-time block checksum
34 17 Customer modifiable constants checksum
35 0 Power interruption. (Not an active code: only appears after power is restored.) During power interruption, DNS light is not illuminated and the transmission willnot shift.
35 16 Real-time write interruption. (Power interruption at the same time the ECU is recording a critical code to the real-time section.)
36 0 Mismatch between ECU hardware and software
36 1 TransID not compatible with hardware/software
36 2 TransID did not complete
42 12 Short-to-battery A Solenoid Circuit
42 13 Short-to-battery B Solenoid Circuit
42 14 Short-to-battery C Solenoid Circuit
42 15 Short-to-battery D Solenoid Circuit
42 16 Short-to-battery E Solenoid Circuit
42 21 Short-to-battery F Solenoid Circuit
42 22 Short-to-battery G Solenoid Circuit
42 23 Short-to-battery H Solenoid Circuit
42 24 Short-to-battery J Solenoid Circuit
42 26 Short-to-battery N Solenoid Circuit
44 12 Short-to-Ground A Solenoid Circuit
44 13 Short-to-Ground B Solenoid Circuit
44 14 Short-to-Ground C Solenoid Circuit
44 15 Short-to-Ground D Solenoid Circuit
44 16 Short-to-Ground E Solenoid Circuit
44 21 Short-to-Ground F Solenoid Circuit
44 22 Short-to-Ground G Solenoid Circuit
44 23 Short-to-Ground H Solenoid Circuit
44 24 Short-to-Ground J Solenoid Circuit
44 26 Short-to-Ground N Solenoid Circuit
45 12 Open Circuit A Solenoid Circuit
45 13 Open Circuit B Solenoid Circuit
45 14 Open Circuit C Solenoid Circuit
45 15 Open Circuit D Solenoid Circuit
45 16 Open Circuit E Solenoid Circuit
45 21 Open Circuit F Solenoid Circuit
45 22 Open Circuit G Solenoid Circuit
45 23 Open Circuit H Solenoid Circuit
45 24 Open Circuit J Solenoid Circuit
45 26 Open Circuit N Solenoid Circuit
46 21 Overcurrent, F-High solenoid circuit
46 26 Overcurrent, N and H-High solenoid circuit
46 27 Overcurrent, A-High solenoid circuit
51 1 Low-1 upshift
51 10 1-Low downshift
51 12 1-2 upshift
51 21 2-1 downshift
51 23 2-3 upshift
51 24 2-4 upshift
51 35 3-5 upshift
51 42 4-2 downshift
51 43 4-3 downshift
51 45 4-5 upshift
51 46 4-6 upshift
51 53 5-3 downshift
51 64 6-4 downshift
51 65 6-5 downshift
51 XY X-Y upshift or downshift
52 1 L-1 upshift
52 8 L-N1 shift
52 32 3-2 downshift
52 34 3-4 upshift
52 54 5-4 downshift
52 56 5-6 upshift
52 71 R-1 shift
52 72 R-2 shift
52 78 R-N1 shift
52 99 N3-N2 shift
52 XY X-Y shift
53 8 L-N1 shift
53 9 L-NNC shift
53 18 1-N1 shift
53 19 1-RELS shift
53 28 2-N1 shift
53 29 2-N2 shift
53 38 3-N1 shift
53 39 3-N3 shift
53 48 4-N1 shift
53 49 4-N3 shift
53 58 5-N1 shift
53 59 5-N3 shift
53 68 6-N1 shift
53 69 6-N4 shift
53 78 R-N1 shift
53 99 N3-N2 or N2-N3 shift
53 XY X-Y shift
54 1 L-1 upshift
54 7 L-R shift
54 10 1-L downshift
54 12 1-2 upshift -- may be incorrect calibration (wide ratio vs. close ratio or close ratio MD product line instead of HD product line)
54 17 1-R shift
54 21 2-1 downshift
54 23 2-3 upshift
54 24 2-4 upshift
54 27 2-R shift
54 32 3-2 downshift
54 34 3-4 upshift
54 35 3-5 upshift
54 42 4-2 downshift
54 43 4-3 downshift
54 45 4-5 upshift
54 46 4-6 upshift
54 53 5-3 downshift
54 54 5-4 downshift
54 56 5-6 upshift
54 64 6-4 downshift
54 65 6-5 downshift
54 70 R-L shift
54 71 R-1 shift
54 72 R-2 shift
54 80 N1-L shift
54 81 N1-1 shift
54 82 N1-2 shift
54 83 N1-3 shift
54 85 N1-5 shift
54 86 N1-6 shift
54 87 N1-R shift -- associated with loose output speed tone wheel on MD product line models
54 92 N2-2 shift
54 93 N3-3 shift
54 95 N3-5 shift
54 96 N4-6 shift
54 XY X to Y shift
55 7 Oncoming C3PS (after shift), L-R shift
55 17 Oncoming C3PS (after shift), 1-R shift
55 27 Oncoming C3PS (after shift), 2-R shift
55 87 Oncoming C3PS (after shift), N1-R shift
55 97 Oncoming C3PS (after shift), N1-L to R shift
55 XY Oncoming C3PS (after shift), X to Y shift
56 0 Range verification ration test (between shifts) L
56 11 Range verification ration test (between shifts) 1
56 22 Range verification ration test (between shifts) 2
56 33 Range verification ration test (between shifts) 3
56 44 Range verification ration test (between shifts) 4
56 55 Range verification ration test (between shifts) 5
56 66 Range verification ration test (between shifts) 6
56 77 Range verification ration test (between shifts) R
57 11 Range verification C3 pressure switch while in 1st
57 22 Range verification C3 pressure switch while in 2nd
57 44 Range verification C3 pressure switch while in 4th
57 66 Range verification C3 pressure switch while in 6th
57 88 Range verification C3 pressure switch while in N1
57 99 Range verification C3 pressure switch while in N2 or N4
62 12 Retarder temperature sensor failed low
62 23 Retarder temperature sensor failed high
62 32 Engine collant sensor failed low
62 33 Engine collant sensor failed high
63 0 Auxiliary Function Range Inhibit (Special) inputs states are different
63 26 Kickdown input failed on (software version 8 only)
63 40 Service brake status failed on
63 41 Pump/pack and a neutral general purpose input
63 47 RELS input failed on
64 12 Retarder Modulation Request sensor failed Low (14 counts and below)
64 23 Retarder Modulation Request sensor failed High (32 counts and above)
66 0 SCI (Serial Communication Interface) fault
66 11 SCI Engine coolant source fault
66 22 J1939 Retarder request fault
66 33 J1939 Driver demand torque fault
66 34 Engine not responding to J1939 SEM control
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