The On-Board Diagnostics II (OBD2) system is a standardized system in modern vehicles that provides access to crucial vehicle health information. For Audi A4 owners, understanding and utilizing the OBD2 port is essential for diagnostics and maintenance. This guide will help you locate your Audi A4’s OBD2 connector, understand its pinout, and utilize it for effective vehicle maintenance.
Understanding the OBD2 Connector
The OBD2 connector, also known as a diagnostic port, is a standardized 16-pin interface that allows communication with your vehicle’s Engine Control Unit (ECU) and other control modules. This port enables mechanics and car owners to retrieve diagnostic trouble codes (DTCs), monitor live data, and perform various diagnostic tests using an OBD2 scanner or scan tool. It’s a vital tool for identifying issues, from a simple check engine light to more complex engine or transmission problems.
Locating the OBD2 Connector in Your Audi A4
Finding the OBD2 port in your Audi A4 is usually straightforward. While the exact location can slightly vary depending on the model year and generation of your A4, it is generally located within the driver’s side interior, under the dashboard.
Here are the common locations to check:
- Under the Dashboard, Driver’s Side: This is the most typical location. Look for a 16-pin, trapezoid-shaped connector. It’s often near the steering column or in the vicinity of the pedals. You might need to crouch down and look upwards to spot it.
- Lower Dashboard Panel: In some Audi A4 models, the OBD2 port might be located on the lower panel of the dashboard, closer to the door. Check for a small access panel or look directly underneath the dash plastic trim.
- Center Console Area (Less Common): Although less frequent in A4s, some models might have the OBD2 port positioned in the center console area, usually near the gear shifter or under an ashtray or small compartment.
Once you’ve located the port, ensure it is easily accessible for connecting your OBD2 scanner when needed.
Decoding the Audi A4 OBD2 Connector Pinout
The OBD2 connector has a standardized pinout, but understanding the function of each pin can be helpful for advanced diagnostics or when using specialized equipment. Here’s a breakdown of the standard OBD2 pinout, which applies to your Audi A4:
| Pin | Signal | Description |
|---|---|---|
| 2 | J1850 Bus+ | (SAE J1850 PWM & VPW) |
| 4 | CGND | Chassis Ground |
| 5 | SGND | Signal Ground |
| 6 | CAN High | CAN Bus High (J-2284) |
| 7 | K-LINE | ISO 9141-2 & ISO 14230-4 (KWP2000) |
| 10 | J1850 Bus- | (SAE J1850 PWM & VPW) |
| 14 | CAN Low | CAN Bus Low (J-2284) |
| 15 | ISO 9141-2 L-LINE | ISO 9141-2 & ISO 14230-4 (KWP2000) |
| 16 | +12V | Battery Power |
Alt text: OBD2 connector pinout diagram showing pin numbers and descriptions for automotive diagnostics.
Key Pins for Audi Diagnostics:
- Pin 4 & 5 (Grounds): These pins provide the necessary ground connections for the OBD2 scanner to function correctly.
- Pin 6 & 14 (CAN Bus): CAN (Controller Area Network) bus is a high-speed communication protocol commonly used in newer Audi A4 models (typically from 2008 onwards).
- Pin 7 & 15 (K-Line/ISO 9141-2): K-Line is an older communication protocol used in earlier Audi A4 models (roughly pre-2008). ISO 9141-2 and KWP2000 protocols are also associated with these pins in older systems.
- Pin 16 (+12V Battery Power): This pin provides power from the car battery to the OBD2 scanner.
Understanding these pins is generally not necessary for basic OBD2 scanning, but it can be valuable for advanced users or when troubleshooting communication issues.
OBD2 Protocols and Audi A4 Compatibility
Audi A4 models, like other vehicles, have utilized different OBD2 protocols over the years. The protocol used dictates how the OBD2 scanner communicates with your car’s computer. Here’s a general timeline for Audi OBD2 protocols:
- Pre-OBD2 (Pre-1996): Some very early Audi A4 models might predate the standardized OBD2 system or use proprietary diagnostic systems. OBD2 compatibility would be limited or non-existent.
- ISO 9141-2 and KW 1281 (1996 – ~2001/2004): Many Audi A4s in this era used ISO 9141-2 or KW 1281 protocols. These are serial communication protocols.
- KWP2000 (ISO 14230-4) (~2002 – 2007): KWP2000 became more prevalent in the early to mid-2000s. This is also a serial communication protocol but with improvements over ISO 9141-2.
- CAN (Controller Area Network) (2008 onwards): Starting around 2008, Audi A4 models, in line with industry trends, adopted CAN bus protocol, offering faster and more robust communication.
Refer to the compatibility list provided below for specific Audi A4 models, years, and their corresponding OBD2 protocols. This list, while not exhaustive, gives a good indication of OBD2 compatibility across different Audi models.
[Include the compatibility table from the original article here]
Audi OBD-2 compatibility list
| Model | Engine | Year (starting from) | OBD-2 Protocol |
|---|---|---|---|
| Audi 100 | C4 2.5 TDI AAT 1.Generation, Diesel (114 HP) | 1992 | KW 1281 |
| C4 4A, Gasoline (114 HP) | 1994 | ||
| Audi 200 | 20V, Gasoline (218 HP) | 1990 | |
| Audi 80 | Gasoline (172 HP) | 1991 | KW 1281 |
| 2,8E Automatik, Gasoline (172 HP) | 1991 | KW 1281 | |
| B4, Gasoline (112 HP) | 1991 | ||
| B4, Gasoline (114 HP) | 1992 | KW 1281 | |
| B4, TDI, MKB 1Z, Diesel (89 HP) | 1992 | KW 1281 | |
| (B4) 2.0 ABT, Gasoline (89 HP) | 1993 | KW 1281 | |
| B4, Gasoline (114 HP) | 1993 | KW 1281 | |
| B4 Motor ABK, ECU:039906024A Digifant 1.75 , Gasoline (114 HP) | 1993 | KW 1281 | |
| B4 TDI, Diesel (89 HP) | 1993 | KW 1281 | |
| Gasoline (89 HP) | 1994 | KW 1281 | |
| (B4) Motor ABT, Gasoline (89 HP) | 1994 | ||
| B4, Gasoline (89 HP) | 1994 | KW 1281 | |
| B4, Gasoline (89 HP) | 1994 | KW 1281 | |
| B4 (ABT), Gasoline (89 HP) | 1994 | KW 1281 | |
| B4 2.0 (ABT), Gasoline (89 HP) | 1994 | KW 1281 | |
| tdi, Diesel (89 HP) | 1994 | KW 1281 | |
| TDI (B4), Diesel (89 HP) | 1995 | KW 1281 | |
| Audi 80 Avant | Gasoline (114 HP) | 1995 | KW 1281 |
| Audi 80 Coupe | Gasoline (172 HP) | 1994 | ISO 9141-2 |
| Audi 8L | 1,8 Turbo Oettinger, Gasoline (191 HP) | 1997 | |
| Audi A1 | 1.4 TFSI, Gasoline (122HP) | 2012 | CAN 11bit (500kb) |
| Audi A2 | Gasoline (74 HP) | 2000 | |
| 1,4 TDI, Diesel (74 HP) | 2001 | ISO 9141-2 | |
| 1.4L, Gasoline (74 HP) | 2001 | KW 1281 | |
| 1.4, Diesel (75HP) | 2001 | ISO 9141 | |
| Diesel (88 HP) | 2002 | KW 1281 | |
| 1,4 TDI, Diesel (74 HP) | 2002 | KW 1281 | |
| 1.2 TDI, Diesel (61 HP) | 2002 | KW 1281 | |
| Gasoline (74 HP) | 2004 | ISO 9141-2 | |
| Diesel (89 HP) | 2004 | KW 2000 VAG | |
| 1.6 FSI, Gasoline (110HP) | 2004 | ISO 9141 | |
| Diesel (89 HP) | 2005 | KW 1281 | |
| Audi A3 | Gasoline (100 HP) | 1988 | |
| Gasoline (124 HP) | 1995 | KW 1281 | |
| (L, Gasoline (109 HP) | 1995 | KW 1281 | |
| 1.9 tdi, Diesel (90HP) | 1996 | ISO 9141 | |
| Gasoline (124 HP) | 1997 | KW 1281 | |
| Diesel (109 HP) | 1997 | KW 1281 | |
| 8L, Diesel (89 HP) | 1997 | KW 1281 | |
| 8L, Diesel (89 HP) | 1997 | KW 1281 | |
| (8L), Automatikgetriebe, Gasoline (100 HP) | 1997 | KW 1281 | |
| Gasoline (148 HP) | 1998 | KW 1281 | |
| Gasoline (148 HP) | 1998 | KW 1281 | |
| Diesel (108 HP) | 1999 | KW 1281 | |
| tdi 8L, Diesel (89 HP) | 1999 | KW 1281 | |
| 1.8T AUM, Gasoline (148 HP) | 2000 | KW 1281 | |
| 1.9 TDi, Diesel (110HP) | 2000 | ISO 9141 | |
| 1.8 Turbo, Gasoline (180HP) | 2000 | ISO 9141 | |
| Gasoline (101 HP) | 2001 | KW 1281 | |
| Diesel (109 HP) | 2001 | KW 1281 | |
| 1.6, Gasoline (102HP) | 2001 | KWP SLOW | |
| 1.9 tdi, Diesel (130HP) | 2001 | ISO 9141 | |
| 1.8 Turbo, Gasoline (210HP) | 2001 | ISO 9141 | |
| – 8L – , Diesel (129 HP) | 2002 | KW 1281 | |
| 8L, Gasoline (101 HP) | 2002 | ||
| 8L, Diesel (100 HP) | 2002 | KW 1281 | |
| 1.9 tdi, Diesel (105HP) | 2002 | ISO 9141 | |
| 2.0 tdi, Diesel (140HP) | 2003 | #ССЫЛКА! | |
| P8, Diesel (139 HP) | 2004 | CAN | |
| P8, Diesel (139 HP) | 2004 | KW 1281 | |
| – 8P, Gasoline (97 HP) | 2004 | CAN | |
| 8p, Gasoline (97 HP) | 2004 | ||
| 8P, Diesel (139 HP) | 2004 | KW 1281 | |
| 3.2 V6, Gasoline (250HP) | 2004 | KWP SLOW | |
| 1.9TDi, Diesel (105HP) | 2005 | KWP SLOW | |
| 2.0 TFSi, Gasoline (200HP) | 2005 | KWP SLOW | |
| 1.9 TDi, Diesel (90HP) | 2006 | KWP SLOW | |
| 2.0 TDi, Diesel (170HP) | 2006 | CAN 11bit (500kb) | |
| 1.4 T, Gasoline (124 HP) | 2007 | CAN | |
| 8P, Gasoline (101 HP) | 2007 | ISO 9141-2 | |
| 8P / 151 KW / Disel Sportback 2,0 L, Diesel (203 HP) | 2007 | KW 2000 VAG | |
| 2.0 tdi, Diesel (140HP) | 2007 | KWP SLOW | |
| 2, Gasoline (200HP) | 2007 | CAN 11bit (500kb) | |
| 2.0 TDI, Diesel (136 HP) | 2008 | CAN | |
| 2.0 TDi, Diesel (140HP) | 2008 | CAN 11bit (500kb) | |
| Audi A3 8PA Sportback | Diesel (104 HP) | 2007 | |
| Audi A3 Cabrio | 8P 1,9l, Diesel (104 HP) | 2008 | CAN |
| Audi A4 | Gasoline (124 HP) | 1995 | KW 1281 |
| Gasoline (124 HP) | 1995 | ||
| Gasoline (100 HP) | 1995 | KW 1281 | |
| Gasoline (172 HP) | 1995 | KW 1281 | |
| (B5), Diesel (89 HP) | 1995 | KW 1281 | |
| 1,8T AEB, Gasoline (148 HP) | 1995 | KW 1281 | |
| 1.8, Gasoline (123 HP) | 1995 | KW 1281 | |
| 1.9 TDi, Diesel (110HP) | 1996 | ISO 9141 | |
| Diesel (109 HP) | 1997 | KW 1281 | |
| (B5), Gasoline (100 HP) | 1997 | KW 1281 | |
| (B5) Avant (1.9 TDI, Motor: AFN), Diesel (109 HP) | 1997 | KW 1281 | |
| 1.8 20V, Gasoline (124 HP) | 1997 | KW 1281 | |
| 1.9 TDI AFN, Diesel (119 HP) | 1997 | KW 1281 | |
| Gasoline (148 HP) | 1998 | ||
| 1998 | ISO 14230-4, ISO 9141-2 | ||
| Diesel (109 HP) | 1998 | ||
| Diesel (124 HP) | 1998 | KW 1281 | |
| 1.9 tdi, Diesel (110HP) | 1998 | ISO 9141 | |
| Diesel (172 HP) | 1999 | ||
| 2.5 TDi, Diesel (150HP) | 1999 | ISO 9141 | |
| (B5) Avant 2,5TDI, Diesel (148 HP) | 2000 | KW 1281 | |
| 1,8t s-line B5, Gasoline (148 HP) | 2000 | ||
| 1.9 tdi, Diesel (115HP) | 2000 | ISO 9141 | |
| 2001 | ISO 14230-4, ISO 9141-2 | ||
| Diesel (114 HP) | 2001 | ISO 9141-2 | |
| Diesel (129 HP) | 2001 | ||
| 1.9 TDI, Diesel (114 HP) | 2001 | ISO 9141-2 | |
| 1.9 TDI, Diesel (109 HP) | 2001 | ISO 9141-2 | |
| 2,5 TDI quattro (8E/B6), Diesel (178 HP) | 2001 | KW 1281 | |
| V6 Quattro (8E), Gasoline (218 HP) | 2001 | KW 1281 | |
| 1.9 TDi, Diesel (130HP) | 2001 | ISO 9141 | |
| 1.8 T, Gasoline (150HP) | 2001 | ISO 9141 | |
| 2.5 TDi, Diesel (155HP) | 2001 | ISO 9141 | |
| Diesel (161 HP) | 2002 | KW 1281 | |
| (8E), Diesel (129 HP) | 2002 | KW 1281 | |
| 1.9 tdi, Diesel (101HP) | 2002 | ISO 9141 | |
| 2.5 V6 tdi, Diesel (180HP) | 2002 | ISO 9141 | |
| 8e, Gasoline (161 HP) | 2003 | ||
| -Avant-2,5TDI, Diesel (178 HP) | 2003 | KW 1281 | |
| 1.8 T, Gasoline (163HP) | 2003 | KWP SLOW | |
| Gasoline (129 HP) | 2004 | ||
| 2,5 TDI , Diesel (161 HP) | 2004 | KW 1281 | |
| TDI 1.9, Diesel (117 HP) | 2004 | ISO 14230-4 | |
| 1.9 tdi, Diesel (116HP) | 2004 | KWP SLOW | |
| 2.5, Diesel (163HP) | 2004 | ISO 9141 | |
| (B7), Gasoline (198 HP) | 2005 | CAN | |
| 2.0 tdi (BPW), Diesel (140HP) | 2005 | CAN 11bit (500kb) | |
| 2, Diesel (140HP) | 2005 | CAN 11bit (500kb) | |
| 1.9 TDi, Diesel (115HP) | 2006 | CAN 11bit (500kb) | |
| tdi, Diesel (136HP) | 2010 | CAN 11bit (500kb) | |
| 2.0 TDi, Diesel (143HP) | 2011 | CAN 11bit (500kb) | |
| Audi a4 AFN | Diesel (109 HP) | 1998 | KW 1281 |
| Audi A4 AHU | Gasoline (89 HP) | 1998 | |
| Audi A4 Avant | Gasoline (124 HP) | 1995 | |
| B5, Gasoline (124 HP) | 1995 | ||
| Gasoline (148 HP) | 1997 | ||
| Quattro 1.8T, Gasoline (148 HP) | 1997 | ||
| Gasoline (124 HP) | 1999 | KW 1281 | |
| 8D5, 2.5TDI, Diesel (148 HP) | 1999 | KW 1281 | |
| B6 1.9TDI, Diesel (129 HP) | 2005 | KW 1281 | |
| 2.7 TDI DPF, Diesel (178 HP) | 2006 | CAN | |
| B7/8E, Diesel (139 HP) | 2007 | KW 1281 | |
| 3.0 TDI 8ED , Diesel (230 HP) | 2008 | ||
| 3.0 TDI 8ED, Diesel (230 HP) | 2008 | ||
| Audi a4 b5 | Gasoline (172 HP) | 1994 | |
| Gasoline (172 HP) | 1995 | ||
| Gasoline (98 HP) | 1995 | ||
| (1.9 TDI, Motor: 1Z), Diesel (89 HP) | 1995 | KW 1281 | |
| (8D), Gasoline (100 HP) | 1995 | KW 1281 | |
| 8D, Gasoline (104 HP) | 1995 | ISO 9141-2 | |
| Gasoline (148 HP) | 1997 | KW 1281 | |
| 1.8T, Gasoline (148 HP) | 1997 | ||
| Gasoline (124 HP) | 1998 | KW 1281 | |
| (8D), Gasoline (100 HP) | 1998 | KW 1281 | |
| TDI 81KW AFN Quattro, Diesel (109 HP) | 1998 | KW 1281 | |
| Gasoline (100 HP) | 1999 | KW 1281 | |
| Gasoline (163 HP) | 1999 | KW 1281 | |
| (mod. 2000), Gasoline (100 HP) | 1999 | KW 1281 | |
| ab 1999, Gasoline (148 HP) | 1999 | KW 1281 | |
| Gasoline (124 HP) | 2000 | ||
| Gasoline (124 HP) | 2000 | ISO 9141-2 | |
| Gasoline (100 HP) | 2000 | KW 1281 | |
| Diesel (148 HP) | 2000 | KW 1281 | |
| Audi A4 B5 Avant | Diesel (109 HP) | 1997 | KW 1281 |
| Diesel (114 HP) | 2000 | KW 1281 | |
| Audi A4 B6 | 2.0 (engine code ALT), Gasoline (129 HP) | 2001 | KW 1281 |
| 8E, Gasoline (128 HP) | 2001 | ||
| Audi A4 B7 Avant | Diesel (168 HP) | 2007 | KW 1281 |
| Audi A4 B7 Variant | Diesel (161 HP) | 2005 | KW 1281 |
| Audi A4 Cabrio | Gasoline (202 HP) | 2002 | |
| 3.0 V6 (ASN), Gasoline (218 HP) | 2003 | KW 1281 | |
| Audi A4 Kombi | Gasoline (124 HP) | 1999 | KW 1281 |
| 2-Liter/4-Zyl., Gasoline (131 HP) | 2002 | ISO 14230-4 | |
| Audi A4/S4 | (B5), Gasoline (262 HP) | 2000 | ISO 9141-2 |
| Audi A5 | 3.2 FSI, Gasoline (265HP) | 2008 | CAN 11bit (500kb) |
| 2.0 TFSI, Gasoline (211HP) | 2011 | CAN 11bit (500kb) | |
| Audi A6 | C4, Gasoline (148 HP) | 1994 | ISO 9141-2 |
| C4, Gasoline (114 HP) | 1994 | ||
| (C4), Gasoline (148 HP) | 1995 | KW 1281 | |
| 2,6 (Typ C4), Gasoline (148 HP) | 1995 | ISO 9141-2 | |
| C4, Gasoline (148 HP) | 1995 | KW 1281 | |
| C4, Diesel (139 HP) | 1995 | KW 1281 | |
| C4, Diesel (114 HP) | 1995 | KW 1281 | |
| C4 4A, Diesel (139 HP) | 1995 | KW 1281 | |
| C4 Motor ABK, Gasoline (114 HP) | 1995 | ||
| , Diesel (139 HP) | 1995 | KW 1281 | |
| 1998 | ISO 14230-4, ISO 9141-2 | ||
| Diesel (202 HP) | 1998 | ||
| 2.8 Avant Quattro, Gasoline (191 HP) | 1998 | ISO 9141-2 | |
| (4B), Gasoline (148 HP) | 1999 | KW 1281 | |
| 2,5 tdI, Diesel (148 HP) | 1999 | ||
| 4B, Gasoline (148 HP) | 1999 | KW 1281 | |
| 4B, Diesel (148 HP) | 1999 | ||
| 4B 2,5 TDI, Diesel (135 HP) | 1999 | ||
| 4B C5 Avant 2.8, Gasoline (191 HP) | 1999 | KW 1281 | |
| Diesel (148 HP) | 2000 | ||
| Diesel (148 HP) | 2000 | ||
| 4B 2,7T, Gasoline (227 HP) | 2000 | KW 1281 | |
| 4B 2.8l V6 quattro, Gasoline (191 HP) | 2000 | KW 1281 | |
| B4-C5, Diesel (178 HP) | 2000 | KW 1281 | |
| 2.5 V6 tdI, Diesel (150HP) | 2000 | ISO 9141 | |
| Diesel (148 HP) | 2001 | KW 1281 | |
| 2.4, Gasoline or LPG (165HP) | 2001 | ISO 9141 | |
| 1.9 TDi, Diesel (130HP) | 2002 | ISO 9141 | |
| 2.5 tdi, Diesel (163HP) | 2002 | ISO 9141 | |
| 2.5 V6 tdI, Diesel (180HP) | 2002 | ISO 9141 | |
| 2.7t, Gasoline (250HP) | 2002 | ISO 9141 | |
| 4B 2,5 TDI, Diesel (161 HP) | 2003 | ISO 9141-2 | |
| 4B, Gasoline (218 HP) | 2003 | KW 1281 | |
| 4B Avant 3.0, Gasoline (218 HP) | 2003 | KW 1281 | |
| 4B06H 1.9 TDI, Diesel (135 HP) | 2003 | KW 1281 | |
| 4B, Diesel (178 HP) | 2003 | ||
| Gasoline (242 HP) | 2004 | CAN | |
| 2,5 TDI, Diesel (178 HP) | 2004 | ISO 9141-2 | |
| Gasoline (171 HP) | 2005 | ||
| 2.5 TDI, Diesel (178 HP) | 2005 | ISO 9141-2 | |
| 3.0 TDI (Typ: 4F), Diesel (222 HP) | 2005 | CAN | |
| 3l V6 TDi, Diesel (225HP) | 2005 | CAN 11bit (500kb) | |
| 3, Diesel (233HP) | 2005 | CAN 11bit (500kb) | |
| Diesel (137 HP) | 2006 | ||
| C6, Diesel (137 HP) | 2006 | ||
| 2.7, Diesel (180HP) | 2006 | CAN 11bit (500kb) | |
| Diesel (179 HP) | 2007 | ||
| 2.0 TDi, Diesel (139HP) | 2009 | CAN 11bit (500kb) | |
| Audi A6 Allroad | (4b), Diesel (176 HP) | 2001 | KW 1281 |
| Audi A6 Avant | 2,4 Motor ALF V6, Gasoline (163 HP) | 1998 | ISO 9141-2 |
| 2,4 V6, Gasoline (163 HP) | 1998 | KW 1281 | |
| Diesel (148 HP) | 1999 | ||
| quattro, Gasoline (218 HP) | 2001 | KW 1281 | |
| 2,5 TDI quattro, Diesel (178 HP) | 2003 | KW 1281 | |
| Audi A8 | , Gasoline (227 HP) | 1995 | KW 1281 |
| , Gasoline (401 HP) | 1995 | ||
| 2.5, Diesel (150HP) | 1998 | ISO 9141 | |
| 4.2 V8, Gasoline (340HP) | 1998 | ISO 9141 | |
| 3.7, Gasoline (280HP) | 2002 | KWP SLOW | |
| , Diesel (238 HP) | 2004 | ISO 9141-2 | |
| , Gasoline (330 HP) | 2005 | CAN | |
| Audi Allroad | Gasoline (247 HP) | 2000 | KW 1281 |
| Gasoline (247 HP) | 2002 | ||
| Gasoline (247 HP) | 2002 | ISO 14230-4, ISO 9141-2 | |
| Audi B4 | 2,6 MK ABC, Gasoline (148 HP) | 1993 | KW 1281 |
| 2,6l Avant Quattro, Gasoline (148 HP) | 1994 | KW 1281 | |
| Audi B5 | Gasoline (124 HP) | 1995 | KW 1281 |
| Audi B5 Avant | Gasoline (124 HP) | 1999 | KW 1281 |
| Audi Cabrio | Typ 89 (8H), Gasoline (124 HP) | 2000 | KW 1281 |
| Typ 89, Gasoline (148 HP) | 1995 | KW 1281 | |
| 1997 | ISO 14230-4, ISO 9141-2 | ||
| Gasoline (148 HP) | 1997 | KW 1281 | |
| Audi Coupe | 20V Quattro, Gasoline (165 HP) | 1990 | KW 1281 |
| Gasoline (172 HP) | 1992 | KW 1281 | |
| Typ89, Gasoline (148 HP) | 1995 | ||
| Audi Q5 | Diesel (168 HP) | 2000 | CAN |
| 3.0 TDi, Diesel (190HP) | 2010 | CAN 11bit (500kb) | |
| Audi Q7 | 3, Diesel (211HP) | 2007 | CAN 11bit (500kb) |
| 3, Diesel (240HP) | 2008 | CAN 11bit (500kb) | |
| Audi Quattro | 2.V8 30v, Gasoline (191 HP) | 1997 | |
| Audi S 8 | Gasoline (336 HP) | 1998 | KW 1281 |
| Audi S3 | 2.0 TFSI, Gasoline (265HP) | 2007 | CAN 11bit (500kb) |
| Audi S4 | (B5) , Gasoline (261 HP) | 1999 | KW 1281 |
| 2.7 BiTurbo, Gasoline (258 HP) | 2001 | ||
| Gasoline (326 HP) | 2003 | ||
| 4.2 MPi, Gasoline (344HP) | 2003 | KWP SLOW | |
| Audi S6 | C4, Gasoline (227 HP) | 1995 | KW 1281 |
| (Modell 2001, 4B/C5), Gasoline (322 HP) | 2000 | KW 1281 | |
| Quattro V8 4.2, Gasoline (320 HP) | 2001 | ||
| 4.2 V8, Gasoline (340HP) | 2001 | ISO 9141 | |
| Audi TT | 1.8T, Gasoline (180HP) | 1998 | ISO 9141 |
| Coupe Quattro, Gasoline (222 HP) | 1999 | KW 1281 | |
| quattro, Gasoline (222 HP) | 1999 | KW 1281 | |
| 1.8 quattro, Gasoline (222 HP) | 2000 | KW 1281 | |
| Gasoline (148 HP) | 2001 | KW 1281 | |
| 1.8 Turbo, Gasoline (225HP) | 2001 | ISO 9141 | |
| Roadster, Gasoline (148 HP) | 2002 | ||
| 1.8 T, Gasoline (150HP) | 2002 | ISO 9141 | |
| Gasoline (188 HP) | 2003 | ||
| 1.8 Turbo, Gasoline (163HP) | 2004 | ISO 9141 | |
| 3.2 V6, Gasoline (250HP) | 2006 | CAN 11bit (500kb) | |
| 2.0 TFSI, Gasoline (211HP) | 2007 | CAN 11bit (500kb) | |
| Audi V8 | D11, Gasoline (247 HP) | 1990 | KW 1281 |
Utilizing an OBD2 Scanner with Your Audi A4
Once you’ve located the OBD2 connector in your Audi A4, using an OBD2 scanner is a simple process:
- Turn off the ignition: Ensure your Audi A4 is turned off before connecting the scanner.
- Locate the OBD2 port: As described earlier, find the 16-pin connector.
- Connect the Scanner: Plug your OBD2 scanner into the port. Ensure it is firmly connected.
- Turn on the ignition (but don’t start the engine): Turn the key to the “ON” position. This provides power to the car’s electrical systems and the OBD2 port.
- Follow Scanner Instructions: Turn on your OBD2 scanner and follow the manufacturer’s instructions. Typically, you’ll need to select “Read Codes” or a similar option to start the diagnostic process.
- Diagnose and Troubleshoot: The scanner will display any stored diagnostic trouble codes (DTCs). Note these codes down, as they are crucial for diagnosing the issue. You can then use these codes to research the problem and plan your repairs.
- Clear Codes (Optional): After addressing the issue, you can use the scanner to clear the DTCs and turn off the check engine light. However, ensure the problem is genuinely fixed; otherwise, the light will likely reappear.
Having an OBD2 scanner is an invaluable tool for any Audi A4 owner. It empowers you to understand your vehicle’s health, potentially saving money on mechanic visits for basic diagnostics, and ensuring your Audi A4 runs smoothly for years to come.
