Conquer Engine Code P0171 The Ultimate Guide to Troubleshooting

This code indicates that there is either too little fuel or too much oxygen in the air-to-fuel ratio, specifically relating to the first cylinder bank of the ... The PCV will emit a loud sucking sound when the engine is running on idle. It is relieved by removing the oil dip stick. P0171 means the computer is correcting for a lean condition on bank 1 (the rear bank.) A lean condition can be caused by any number of things. The DTC indicates that the oxygen sensor on the first cylinder bank has detected lean engine conditions. This means that there is too much air or not enough ... P0171 almost always points to a vac leak. Clamp the line to the bleeder valve under the intake. It's a very common failure. The P0171 code is linked to your car having clogged fuel injectors, implying the engine controller is sensing a lean state. If the injector is ... PCM & Fuel Systems - Engine Code P0171 - #P0171- According to the book it means System adaptive feul too lean (bank 1) . code says the o2 sensor is reading too much oxygen ( ie not enough fuel to use up the alotted air). ... When you say you have an 80 mile range - ... The check engine light came on after I washed the engine. I did not use high pressure. I just used a scrub brush with soap and cleaned everything real good. It came up "P0171 Bank 1 SysToo Lean" and the technician explained to me that I had a vacuum leak somewhere.