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99 Pontiac Bonneville SSEi Fault Code P1646

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tjhogan 65

Post subject: 99 Pontiac Bonneville SSEi Fault Code P1646

Posted: Fri May 24, 2024 4:27 pm

LE Member

Joined: Fri Feb 04, 2022 10:47 am
Posts: 9
Year and Trim: 1999 Pontiac Bonneville SSEi

Guys,

I was out and about this morning and all of a sudden, the old girl just dies in the middle of a major intersection. Called AAA and had it towed home. My Dianostic Scanner came up with Fault Code - P1646 - Supercharger boost solenoid Control Circuit. Anyone had this issue?

Anyway, after further investigation and a few more fault codes I ended up replacing the (Supercharger Bypass solenoid, both Oxygen Sensors, Vapor Canister Vent Valve /Solenoid, Gas Cap, Spark Plugs and Wires. She runs great now.

Thanks
Tim

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