Hey all, just changed oil and filter and tighten up valve cover bolts daughters truck 2000 dII. 130,000 miles. ran codes at auto zone as check engine light has come on , she didnt mention it to me. Truck idels great . She says gas milage sucks. here's the codes

P0130 02 sensor malf bank 1 sensor 1
P0150 02 sensor malf bank 2 sensor 1
P0301 cylinder 1 misfire detected
p0171 system to lean bank 1
P1171 manufacture control 1 fuel air metering

plugs and wires have not been changed since she bought it. 1 year ago almost. It had new plugs in it as i pulled one and checked the others. has put but 8,000 mile on it. i am leaning to 02 sensors as i dont think they have ever been changed....

Thanks Chris

 

Who's plug wires and plugs did you use?
Both of your front 02's, per the fault codes are dead so I would replace all 4 and get your codes cleared to see what then happens.

 

never changed the wires and plugs as ran and ideled fine and no lites. WIll order her sensors.

Thanks Chris

 

How many miles on it?
For the wires, if your wires are grey and you are over 70,000 miles, try British Parts of Utah, 8 mm ATI wires for $70 is a great deal, they also have a good price on the the 02 sensors. Buy your plugs at the local parts store, I recommend either Champion dual Platinum of Bosch Platinum Plus 4's.
Doing plugs and wires will get rid of your # 1 misfire and improve your mileage.

 

True story, after changing my O2's, i'm getting nearly 100 miles per tank more than before! I was getting an average of 200-210 on premium, now it right at 300.

Before the O2's I was geting misfires also. The PO changed the Plugs, Wires and Coil pack the weekend before I bought it. I have the service records as proof. I was still getting misfires every once and a while and very poor gas mileage, but nothing serious. I scanned it and sure enough, it was the O2's.

Changed em out and here we are.

Just letting you know.

 

Thanks shane, my daughter will be happy as everytime she fills up she frowns..

Thanks Chris

 

Thanks mike, again..and again... and again... When i win the lottery i wont have to work on these trucks of mine. I will hire you and fly you out first class to fix them....

All the best Chris