Check Engine Light Due to Air Pump Check Valve Failure on Volvo V90

The Check Engine Light may illuminate due to a failure of the air pump check valve.

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Average mileage: 155,000 (155,000–155,000)
2 model years affected: 1997, 1998
3 people reported this problem
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1998 Volvo V90 155,000 mi,
Check Engine light on. No other drivability issues but the code shows Air Pump malfunction.