Pontiac Bonneville OBD1 Codes Code 21

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Error Code 21, 31, & 41

1921 PONTIAC BONNEVILLE
I Have A 1990 Pontiac Boniville With A Little Over 246000 Miles On It.it Has A 3800 V6 In It And The Codes Have Just Started Today.on The...
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Asked by nut01

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