Once in a while my CEL will come on and I get the same two codes. It first happened right after I got my scangauge a few times and then stopped for a while. Now I've had it come on the past two days in the morning. These are the two I get
P1000 OBD-II Monitor Testing Incomplete
P1121 Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
Not being familiar with a scangauge , is there a setting in the unit that automaticly erases the codes after reading them ? That would account for the P1000.
P1121 the TPS has either got a dead spot in it or the MAF sensor is dirty , or the connectors to either may be loose/dirty.