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Pathfinder Fuel Filler Tube Corrosion Recall and P0171 Code: Are They Related?

Model: Fuel filler tube Fault Code: P0171 Posted: 2008-01-10 13:09

In winter states that use road salt, a mixture of snow, water, and salt can cause corrosion on the bare metal section of the fuel filler tube, potentially leading to fuel leaks. This issue is part of a known recall for certain Pathfinder models. I am scheduled to visit my dealership next week to have this recall addressed. I'm wondering if the corrosion in the fuel filler tube could be related to the persistent P0171 code I've been receiving. My vehicle previously visited a non-dealership shop last month for a lean condition complaint. They replaced the fuel filter and air filter, reset the check engine light, but could not identify any vacuum leaks. That night, the P0171 code returned. The shop then replaced two oxygen (O2) sensors and reset the system—however, the P0171 code reappeared the following day. I want to understand whether the fuel filler tube issue is directly linked to this diagnostic trouble code or if it's a separate problem that needs independent diagnosis.

Related fault codes
P0171
Comments (7)
Anonymous 2008-01-10 17:59

It's important to consider that going to a dealership or a qualified repair center with access to technical service bulletins (TSBs) could have saved you significant costs—many issues are misdiagnosed when parts are replaced without proper TSB checks.

Anonymous 2008-01-10 19:54

Based on the symptoms, it seems plausible that the fuel filler tube issue and P0171 code might be related, though this needs further verification through diagnostic testing.

Anonymous 2008-01-10 21:33

cdecee wrote: So I take it that they are related. That's a common assumption—but P0171 (Lean Air Fuel Mixture Bank 1) can stem from many potential causes. It could be anything from a clogged fuel injector to a worn oxygen sensor on bank 1, an intake leak, or even an exhaust leak. Do you have access to diagnostic tools like a scan tool or multimeter? If not, consider using one for accurate readings. Also, note that the engine control module performs internal checks during drive cycles—known as non-continuous monitoring. If these tests fail due to sensor issues or system malfunctions, pending codes or DTCs may appear. Some failure modes prevent these tests from completing entirely. Therefore, before clearing any check engine light, always document all stored codes because some may not return even if the underlying issue persists. Aeroman

Anonymous 2008-01-11 08:30

Keep your hood open until the recall repair is complete—especially if you're using washer fluid. Doing so prevents unnecessary and costly troubleshooting for a problem that should have been identified early through proper diagnostics before replacing components.

Anonymous 2008-01-16 17:17

I own a 1998 Jeep Jimmy and experienced repeated code P0301. I replaced spark plugs, wires, cap, rotor, fuel injector for cylinder 1, PCV valve, intake gasket, fuel filter, and recently the fuel pump and sending unit. Now I'm seeing codes P101, P174, and P0301 again. Could this point to a MAP sensor issue? Any other possibilities? Thanks.

Anonymous 2008-01-17 09:39

Posts in the forums about P0171 on similar trucks indicate that a MAP sensor is not typically the root cause of this code—other factors like intake leaks or sensor failures are more likely.

Anonymous 2008-01-19 19:33

P0171 is not caused by fuel filler tube issues. Corrosion in the filler tube would primarily trigger evaporative emission system codes, not air-fuel ratio-related codes like P0171. The engine control module should detect this and report it accordingly—this is a well-documented point in technical literature.