I need help, can't trust local shops, dealer to expensive. Initial CEL came on 3 mos ago, local shop cleaned MAF sensor and car did fine for 1 month with no lights. CEL and TCS then came on and showed code P1526. I changed the ABV solenoid vavle, car ran great from another month with no lights.Now, CEL light on again and showing P1526 and P0306. Should I just replace the plug on cylinder 6 and replace ignition wire if corroded? If so how do I identify cylinder 6 and are there any problems I might encounter changing these plugs. Why is 1526 showing up again? My car is 01 MillyS with 78K. Any help greatly appreciated!

 

cyl 6 is the front row. 2-4-6. very easy to get to, takes about 20 min. there are no ign wires to change, it is a cop system. mazda recommends plugs changed at 60k. when were the plugs last changed, and what plug did you use? if you used iridiums, now you know why it is best to use factory recommended plugs. we only use the ngk pzfr5f. do NOT use ANY plug with a -11 after the part number. the gap is way too big. these plugs are NOT regappable.

1526 is the abv solenoid, or the vacuum circuit. the vacuum lines and tees fail a LOT more than the solenoid.