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1999 AWD Chevy Astro what and where is bank 1 sensor 3 low voltage bank 2 sensor 1 heater circuit and cylinder misfire?
Wiki User
∙ 17y ago
Start by replacing both FRONT oxygen sensors. They're in the exhaust manifold, just before the headpipe. Next, check the plugs and wires. You should probably replace them and maybe run a compression test while you're at it. For your own sanity, just do one at a time. Maybe replace the oxygen sensors first. That's the most difinitive fault code. Next take the vehicle to an auto parts retailer and have the charging system tested. Do the plugs and wires last. Don't mess with them until the other issues are resolved. Your auto parts retailer will have an OBD code scanner which can clear the codes for you. After you've replaced the oxygen sensors and tested the charging system, clear the codes and drive it for a while to see what happens. Maybe go back a week later, whenever you have the free time, and see if there is a code again. Take it slow and don't throw money at the problem.
Wiki User
∙ 17y ago
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