Does anyone have a DTC tester tool No. 9268 or system tester tool No.
9288, or equivalents to read trouble codes that I can borrow, rent or use?

Porsche Code Retrieval
Accessing Diagnostic Trouble Codes 88-90
Requires the use of DTC tester tool No. 9268 or system tester tool No.
9288, or equivalents to read trouble codes.

91-95
Diagnostic trouble codes may be read using DTC tester tool No. 9268 or system tester tool No. 9288, or equivalents, or through flashing of the "Check Engine" lamp. To display the stored diagnostic trouble codes through the "Check Engine" lamp, proceed as follows:

With engine off, turn ignition switch to On position.
Depress accelerator pedal completely for 3-5 seconds.
Wait for "Check Engine" lamp to flash, then release accelerator pedal. ECU will begin to flash diagnostic trouble codes.
Fully depress accelerator pedal to display next diagnostic trouble code.
When trouble DTC 1000 is displayed, no additional DTC's are stored are memory.

Clearing Diagnostic Trouble Codes
After malfunctions have been repaired, clear diagnostic trouble codes as follows:

With engine off, turn ignition switch to ON position.
Fully depress accelerator pedal for more than 11 seconds.

Diagnostic Trouble Code Identification

DTC Circuit Or Condition
1000 End Of Output
1111 Power Supply Wrong Voltage
1112 Ground In Idle Speed Control Circuit
1113 Ground In Full Load Contact Circuit
1114 Open Engine Temperature 11 Circuit
1115 Idle Control Interrupted
1121 Air Sensor Flow Circuit
1123 Oxygen Sensor
1124 Oxygen Sensor
1125 Air Temperature Sensor
1131 Knock Sensor 1
1132 Knock Sensor
1133 Knock Regulation Circuit
1134 Hall Sender Signal
1141 ECU
1151 Fuel Injector No. 1
1152 Fuel Injector No. 2
1153 Fuel Injector No. 3
1154 Fuel Injector No. 4
1155 Fuel Injector No. 5
1156 Fuel Injector No. 6
1311 Fuel Injector No. 1
1312 Fuel Injector No. 2
1313 Fuel Injector No. 3
1314 Fuel Injector No. 4
1315 Fuel Injector No. 5
1316 Fuel Injector No. 6
1321 Idle Speed Control Circuit
1322 Tank Venting Solenoid
1323 Resonance Flaps
1332 Idle Speed Contact
1333 Full Load Contact
1334 A/C Activation
1335 A/C Activation
1500 No Faults Stored

DTC Circuit or description
11 Supply voltage
14 Engine temp sensor 2
16 Throttle potentiometer
17 0il temperature sensor
18 Rpm signal
19 Speed signal -Speedometer
21 Air flow sensor
23 Oxygen regulation
24 Oxygen sensor
26 Ignition timing change
27 Opening winding of idle stabilizer
28 Closing winding of idle stabilizer
29 Activation of AC relay
31 Knock sensor 1
32 Knock sensor 2
33 Control unit faulty
34 Hall signal
35 VarioCam
36 Idle CO potentiometer
41 Control unit faulty
42 Fuel pump relay (DME-relay)
43 Tank ventilation
45 Check Engine warning lamp
51 Injection valve cylinder 1
52 Injection valve cylinder 2
23 Injection valve cylinder 3
54 Injection valve cylinder 4

LH Diagnostic codes

11 Supply voltage

12/15 Idle speed contact

13 Full load contact

14 Engine temperature sensor II

21 Air mass sensor

22 Idle speed control activation

23 Oxygen regulation stop, rich

24 Oxygen regulation stop, lean

25 Oxygen sensor, open circuit

31 Injection circuit shut down

41 Control unit faulty

EZK Diagnostic codes

12 Idle speed contact

13 Full load contact

14 Engine temperature sensor II

15 Idle or full load contact

21 Load signal LH

26 Transmission protection switch

31 Knock sensor 1

32 Knock sensor 2

33 Control unit faulty (knock sensor)

34 Hall signal

41 Control unit faulty

PSD Diagnostic codes

11 Transverse lock solenoid

12 Transverse acceleration sender - short/break

13 Transverse acceleration sender - not okay

14 Transverse lock - deviation in regulation

15 Control unit - faulty

22 Speed sensor front left

23 Speed sensor front right

24 Speed sensor rear right

25 Speed sensor rear left

31 ABS solenoir front left

32 ABS solenoir front right

33 ABS solenoir rear axle

34 Solenoid relay

35 Return delivery pump

Martin Bishop amendement Theo Jenniskens