I HAVE A 1996 ASTRO. I RECENTLY REPLACED THE INTAKE GASKET AFTER THAT I GOT THE CODE P0147 FOR O2 HEATER MALFUNCTION, RESET AND VAN WAS OK FOR A DAY. NOW I HAVE CODES P0101, P0146, AND P0147. TRANSMISSION IS ACTING FUNNY, DOGGY ACCELERATION FROM STOP THEN ENGINE RPMS ROCKET BUT NOT MUCH ACCEL. THEN SLAMS INTO 2ND. WHEN CRUISING SEEMS THAT THE TRANS HAS NO IDEA WHAT TO DO WITH ITSELF.