Possible causes – Reprogram computer– Faulty Powertrain Control Module (PCM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) MAZDA Related P1639 code 2001 MAZDA TRIBUTE Power Train 2002 MAZDA TRIBUTE Power Train 2001 MAZDA B2300 Power Train 2002 MAZDA B2300 Power Train 2001 MAZDA B2500 Power Train 2002 MAZDA B2500 Power Train…