p0101 p0141 96 blazer trbl codes

[68scout]

truck runs terrible till warm codes that came up were p0101 p0141 p0155 p0300 what should I do

[old_master]

If the DTC's are in that order, check, and repair if/as necessary, the MAF sensor circuit voltages and ground first. Then recheck codes. Always start with the first code and continue with repairs until all codes are gone. P0141 & P0155 are for the oxygen sensor heaters. P0300 is random multiple cylinder misfire. The MAF problem could cause all of the other codes to appear.

[68scout]

sorry about that its a 96 chevy blazer 102000 miles vortec v-6 tune up about 6000 miles ago

[old_master]

Make sure the duct work from the MAF sensor to the throttle body does not have any leaks. Also check the fuel filter, fuel pressure and leakdown to make sure that's not a contributing factor. Low fuel pressure can cause MAF DTC's to show up also.