Fuel System Safety Precautions

WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, 2010 Audi S5, 2009 Audi S5, and 2008 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

Note The Following When Working On The Fuel System:

WARNING:

There is a risk of injury because the fuel is under very high pressure.

Reduce the fuel pressure down to residual pressure before opening high pressure area of the fuel injection system.
To reduce remaining residual pressure, place clean cloth around the connector and carefully loosen connector.

-- Procedures before opening high pressure fuel injection system. Refer to BEFORE OPENING HIGH PRESSURE FUEL INJECTION SYSTEM .

To Prevent Personal Injury And Damage To The Injection And Ignition System, Observe The Following:

The ignition must be switched off before connecting or disconnecting injection and ignition system wiring or tester cables.
Wash the engine only when the ignition is turned off.
If the connectors were disconnected and the engine was started, then malfunctions have been stored in the Engine Control Module (ECM) Diagnostic Trouble Code (DTC) memory: Generate Readiness Code in Guided Functions . Refer to Vehicle Diagnostic Tester.

CAUTION:

Risk Of Damaging Electronic Components When Disconnecting The Battery.

Complete the steps for disconnecting the battery.
Always turn off the ignition before disconnecting the battery.

-- Disconnect the battery. Refer to BATTERY .