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

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.


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Average mileage: 119,000 (119,000–119,000)
Exhaust & Emissions affected: 4.2L 6 Cylinder
1 model year affected: 2004
2 people reported this problem
0 people shared problem details
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