P0171 code
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3rd Gear
Joined: Aug 2019
Posts: 3
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P0171 code
This is in response to a posted yesterday under Blackie16 had problems with that account but this is me. Reply to DTOM , it will not let me clear the code. The check engine light went off , but the code keep coming back immediately after clearing it. The car runs but the gas fumes are really bad.
Pro
Joined: Mar 2018
Posts: 677
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From: Pensacola, FL
Have you done any engine work or exhaust work recently? Maybe a tune? That code is a "lean fuel" code.
- P0171– Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean.
- Lean Condition Meaning: The engine is bringing in too much air to the amount of fuel present. There are a few reasons that a vehicle will get a lean condition. It could be getting too much air (think vacuum leak, EGR problem, or mass airflow sensor) or it is not getting enough fuel (bad injectors, weak fuel pump, dirty fuel filter, bad fuel pressure regulator).
