Check Engine Light on Due to AIR System Fault on Isuzu Ascender

Problem Description and Possible Solution

The Check Engine Light may illuminate due to a failure of the secondary air injection system (AIR) system. Possible faults include the air pump, relay, solenoid, and 02 sensor. Our technicians recommend complete system diagnoses before replacing any parts.


Problem Data
RepairPal Verified
Average mileage: 115,118 (111,237–119,000)
Exhaust & Emissions affected: 4.2L 6 Cylinder
1 model year affected: 2004
4 people reported this problem