Here is an updated list of UTS gate error codes. I don't know the
exact meanings of some 1xx codes, nor which 1xx codes are applicable
to Oystercards.

Paper ticket error codes Oystercard
error cod
0 Valid Ticket Valid ticket
1 UTS Gate Fault (Invalid Tables) Bad data
2 Wrong Type/Direction of use fo Spare
3 NR only - no LUL validity Spare
4 UTS Gate Fault (Check Table Error) Spare
5 Technician signed onto machine Validator in test mode
6 Test Ticket Wrong mode test card
7 Code Unreadable Spare
8 Recoding Error Spare
9 Ticket Damaged Spare
10 Carnet Validated Spare
11 Out of Date Out of date
12 Not Valid Now Not valid Now
13 Additional Fare Payable Spare
14 Not Valid, and is not excessable Spare
15 No onward validity Spare
16 Pass at Invalid station Spare
17 Exs/pfm ticket at wrong station Spare
18 Station Permit at wrong station Spare
19 Start Date in future Start date in the future
20 Spare Oyster card expired
21 Ticket already used for entry Double entry
22 Ticket already used for exit Double exit
23 Carnet not validated on entry Spare
24 Spare Insufficient pre pay - season NOT Z1
25 Spare Unstarted journey
26 Spare Entry / exit same station
27 Spare Pre pay not enabled
28 Spare Pre pay stopped
29 Spare Period ticket stopped
30 Spare Oyster card stopped
31 Invalid From OSI Spare
32 Invalid Into OSI Spare
33 Illogical Interchange through gates Spare
34 Spare Exit not allowed pre pay not validated on journey
35 Spare Insufficient prepay - season includes Z1
36 Spare Insufficient prepay - no season
37 Spare Spare
38 Spare Spare
39 Spare Spare
40 Spare Spare
41 Ticket used three times in quick succession at same station
Zig zag
42 Double use in one direction Passback
43 Spare Spare
44 Spare Spare
45 Spare Spare
46 Spare Spare
47 Spare Spare
48 Spare Spare
49 Spare Spare
50 Spare Spare
51 Already used for 1 journey (single) or 2 journeys (return)
Spare
52 Pass Reported Lost or Stolen Spare
53 Permit Reported Lost or Stolen Spare
54 Possible Dumbbell Spare
55 Spare Spare
56 Spare Spare
57 Spare Station not covered by period ticket
58 Spare Spare
59 Spare Spare
60 Spare Spare
61 Too long spent making interchange Spare
62 Too long spent on journey (carnets only) Spare
63 Too long on platform (platform tickets only) Spare
64 Too long on excess (Fare-Paid tickets only) Spare
65 Entry time exceeded on platform ticket Spare
66 Spare Spare
67 Spare Spare
68 Spare Spare
69 Spare Spare
70 Spare Unknown oyster card
71 Spare Multiple cards
72 Spare Spare
73 Ticket given back for possible emergency use Spare
74 Spare Spare
75 Spare Spare
76 Spare Spare
77 Spare Spare
78 Spare Spare
79 Spare Spare
80 Spare Spare
81 Spare Spare
82 Illogical Use of Ticket Spare
83 Illogical Use of Ticket Spare
84 Spare Spare
85 Spare Spare
86 Spare Spare
87 Spare Spare
88 Spare Spare
89 Spare Spare
90 Gates set to reject this ticket type Rejecting monitored tcket
91 Spare Spare
92 Spare Card directory corrupt
93 Spare Card contents corrupt
94 Spare Card comms failed
95 Spare Spare
96 Spare Reader initialise failed
97 Spare Spare
98 Spare Spare
99 UTS Gate Fault (Check Time-out Spare
100 Issued in delivery mode Issued in delivery mode
101 Issued in Technician Mode Issued in Technician Mode
102 Issued in training mode Issued in training mode
103 Invalid data found on ticket Invalid data found on ticket
104 Spare Spare
105 Invalid BR type Invalid BR type
106 Rejected type Rejected type
107 Time (Type) Time (Type)
108 Time (Passenger) Time (Passenger)
109 Time (Code) Time (Code)
110 Spare Spare
111 Lacks this zone Lacks this zone
112 Not yet valid Not yet valid
113 Out of date Out of date
114 Not yet valid Not yet valid
115 Out of date Out of date
116 Origin or Destination Origin or Destination
117 Not yet valid Not yet valid
118 Out of date Out of date
119 Not yet valid Not yet valid
120 Out of date Out of date
121 Pass not valid here Pass not valid here
122 Invalid type Invalid type
123 Route prohibited Route prohibited
124 Passenger type Passenger type
125 Destination (Exit) Destination (Exit)
126 Origin (Entry) Origin (Entry)
127 Wrong date Wrong date
128 LUL station only LUL station only
129 Wrong direction Wrong direction
130 LUL station only LUL station only
131 Insufficient fare Insufficient fare
132 LUL route LUL route
133 Passback Passback
134 Previously used Previously used
135 Special Rule Applied Special Rule Applied