Conquistador
Member
I am getting the emissions warning light (DTC, EML, whatever it’s called), come up on an almost weekly basis.
It first occurred on a short run, about 6 weeks ago, involving about 30minutes of around town driving, then 10minutes of 70mph, ish, driving. After driving for around 5 of those 10, high speed minutes, the light came on. No change in engine behaviour so I called the AA to hijack their code reader, and 1 live code was reported. P0171 - Bank 1 too lean.
The AA man discovered a perished rubber cap, somewhere on the intake. He believed this to be the culprit, so I got a new rubber cap and slipped that on.
Not so long ago, after a short high speed run, the light came on again. With my own Mickey Mouse code reader on my phone, two codes now appeared, P0171 and P0174. Banks 1 and 2 too lean.
The facts are:
• The light only seems to come on at high speeds, or high demand (fuel issue perhaps?).
• The light causes no change in driveability at all.
• The light remains on until cleared.
• MPG figures and performance remain unchanged.
So far, the only thing I have done, is apply a dose of Redex when I filled up, as a trial. Doesn't seem to have had any positive effect so far.
I wanted to air this and get people’s opinions and views on what options I should take. Do I check everything inlet related, or everything fuel related, or both (what first?)? I understand a certain amount of parts will have to be replaced as an elimination process only, but I want to keep this to a minimum as much as I can.
PS. I have search this on the forum and there is a specific video on youtube but I can't seem to find the solution.
:|
Anyone have any ideas?
It first occurred on a short run, about 6 weeks ago, involving about 30minutes of around town driving, then 10minutes of 70mph, ish, driving. After driving for around 5 of those 10, high speed minutes, the light came on. No change in engine behaviour so I called the AA to hijack their code reader, and 1 live code was reported. P0171 - Bank 1 too lean.
The AA man discovered a perished rubber cap, somewhere on the intake. He believed this to be the culprit, so I got a new rubber cap and slipped that on.
Not so long ago, after a short high speed run, the light came on again. With my own Mickey Mouse code reader on my phone, two codes now appeared, P0171 and P0174. Banks 1 and 2 too lean.
The facts are:
• The light only seems to come on at high speeds, or high demand (fuel issue perhaps?).
• The light causes no change in driveability at all.
• The light remains on until cleared.
• MPG figures and performance remain unchanged.
So far, the only thing I have done, is apply a dose of Redex when I filled up, as a trial. Doesn't seem to have had any positive effect so far.
I wanted to air this and get people’s opinions and views on what options I should take. Do I check everything inlet related, or everything fuel related, or both (what first?)? I understand a certain amount of parts will have to be replaced as an elimination process only, but I want to keep this to a minimum as much as I can.
PS. I have search this on the forum and there is a specific video on youtube but I can't seem to find the solution.
:|
Anyone have any ideas?
I'm guessing the guy I bought it off was just resetting the codes when I went to view the car (buyer beware as they say). 
