Air system faulty solenoid valve

DEZMAXWE11

MEMBER
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.

1 Reply

KHLOW2008

MECHANIC
41,814 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-.