• Tiny
  • dezmaxwe11
  • 2002 Audi A6
  • V8
  • 4WD
  • automatic
  • 97,459 miles

Audi A6 4.2 V8 Quattro 2002. Diagnostic code P0492 - Faulty air solenoid valve and air system relay.
What is the repair cost to fix the problem? Vehicle hesitates and ******" before slowly accelerating after coming out of a stop. Full pressure on gas throttle with delayed weak response. Problem is worse going uphill.

Monday, June 6th, 2011 AT 8:59 PM

1 Answer

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

It most probably is a fault with the power supply to the secondary air pump, the pump itself or a faulty relay.

Cost would depend on what needs to be done but this should not be a very costly job.

Checking voltage supply for secondary air pump relay

? Check fuse for Secondary Air Injection (AIR) Pump Relay -J299-.

If the fuse is not faulty: NOTE: The secondary air pump relay is located in the E-box in the plenum chamber.

? Remove secondary air pump relay from relay carrier.
? Test voltage supply (B+ 30) for relay.

If no malfunctions are identified in the voltage supply for the relay.

? Replace Secondary Air Injection (AIR) Pump Relay -J299-.

Was this
Tuesday, June 7th, 2011 AT 1:56 PM

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