Additional emission regulations
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
| DTC | Error Message | Diagnostic Procedure | Malfunction Criteria and Threshold Value | Secondary Parameters with Enable Conditions | Monitoring Time Length | Frequency of checks, MIL Illum |
|---|---|---|---|---|---|---|
| P2400 | Evaporative Emission System Leak Detection Pump Control Circuit/Open |
|
Open circuit- 2.25 V | LPD- OFF Engine speed- > 80 Rpm | 0.2 Sec |
|
| P2401 | Evaporative Emission System Leak Detection Pump Control Circuit Low |
|
Short to ground- 2.25-3.01 V | LPD- OFF Engine speed- > 80 Rpm | 0.2 Sec |
|
| P2402 | Evaporative Emission System Leak Detection Pump Control Circuit High |
|
Short to battery positive- >3.01 Volts | LPD- ON Engine speed- > 80 Rpm | 0.2 Sec |
|
| P2403 | Evaporative Emission System Leak Detection Pump Sense Circuit/Open |
|
Contact unable to CLOSE- Signal always low | LDP-OFF Purge valve check- Completed | 0.2 Sec |
|
| P2404 | Evaporative Emission System Leak Detection Pump Sense Range/Performance |
|
Contact unable to OPEN- Signal always high | LDP-ON Purge valve check- Completed | 0.2 Sec |
|
| P2422 | Evaporative Emission System Vent Valve Stuck Closed |
|
(Only LEV Audi TT) 2nd leak check while valve is open-2.3 2.7 seconds | Purge valve OPEN LDP- Activated Altitude- 2.500 m Intake air temperature- > 5°C Ambient pressure- > 6 hPa Reduction of intake air start: no deep downhill driving-vehicle speed at low load (2%) Time after engine start- 255 sec Intake manifold low pressure > 150 hPa Engine temperature- 5 - 115°C Restart ECT difference- > 50°C Vehicle speed- > 6 Mph | 240 Sec | 2 DCY |