Thread: P0171 Bank 1 Lean

Cheap bastards

Originally Posted by Supercharged99

Sadly, OP hasn't been back for a few days. Maybe he's busy reading up on super technical automotive lingo like "intake tube" and "oil dipstick"

I don't need to research what a dipstick is. You're quite visible.

I'm happy to have provided so much amusement for all of you, just because I only speak English. For the record, the codes disappeared on their own and haven't reappeared. All I did was change the sperk plugs on the rear bank and not return to Wawa for gas. So, no vacuum leaks, just ****ty gas.

Originally Posted by Supercharged99

Sadly, OP hasn't been back for a few days. Maybe he's busy reading up on super technical automotive lingo like "intake tube" and "oil dipstick"

And BTW, I was busy habing heart bypass surgery. There is nothing "technical" about requesting responses in comprehensible English.

Looks like I missed the party..... You should probably stay away from working on cars.

you can lead a horse to water, but you can't make it drink.

A defective O2 sensore heater will trip an oxygen sensor code, but a lean condition will not. That does not mean that the sensor is good, however. I finally broke down and bought a decent scan tool that can do fuel trims and monitor O2 sensor activity. If the fuel trims improve when idle is raised to 2,000+ rpm, suspect a vaccum leak. If they remain about the same, suspect a malfunctioning O2 sensor. In normal operation, the O2 sensor will fluctuated between ~200 to 800 millivolts. Raising idle should cause it to go rich until the idle is reduced, when it should return quickly to normal. You could also try removing the sensor and cleaning the carbon with carb cleaner if you feel lucky. Glad to hear it cleared by itself. Maybe good gas and an "Italian Tuneup" was all that was necessary. I am sorry to hear of your heart problems. I have been "mechanic free" for the last 25 years. Learning and gaining knowledge is the key to remain that way.