NOTE: 96 & later are OBD2 systems and require a scanner. For an OBD2 code list, please see our Porsche code list or the appropriate generic list.
Porsche: 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.
96-up
Requires System Tester 9288 or generic scan tool to retrieve trouble codes. Please see Porsche OBD2 code list here.
Porsche: 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.
Porsche: Identifying Diagnostic Trouble Codes
| 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 |
I have a Porsche 996 2004 turbo charged all wheel drive, engine starts then Quits
I have a code 9101 CAN drive bus?
Need help please!