← Back to list

P0174 Error in 2001 Nissan Sentra GXE: Can I Drive It Safely After Repairs?

Model: Nissan Sentra Fault Code: P0174 Posted: 2008-08-21 12:46

Hi, I recently purchased a 2001 Nissan Sentra GXE and, during the pre-purchase inspection at Napa, an error code P0175 was detected. The previous owner had it fixed at Firestone with the following repairs: 1) Mass Air Flow (MAF) Sensor replaced 2) Spark plugs replaced 3) Fuel system tune-up completed 4) Intake manifold gasket replacement performed A follow-up engine diagnosis by Napa confirmed everything was fine, and emission testing passed three days prior with clear monitors. However, yesterday the 'Service Engine Soon' light appeared, and a new code — P0174 — was read. The Napa technicians now say they need to perform another diagnostic to identify the root cause. I've already undergone two inspection visits and am concerned about further costs. With all these parts replaced, can I safely drive this vehicle without immediate repair? Could there be any affordable troubleshooting steps I can try myself as a first-time car owner with limited experience? Any advice on potential causes or cost estimates would be greatly appreciated. Thanks, Gaurav

Related fault codes
P0174
Comments (3)
Anonymous 2008-08-22 05:09

It's likely the same underlying issue persists. The previous seller and Firestone may have missed the root cause. I recommend checking for vacuum leaks, verifying fuel pressure, ensuring proper ignition timing, and confirming correct operation of the oxygen sensors.

Anonymous 2008-08-22 08:54

Thanks for your input, Jeff. I'm wondering if it's safe to drive the car right now — it runs fine but has slow acceleration, which was also noted during a test drive one month ago. If I can't fix it myself, how much should I expect to spend? The previous owner paid $1,000 at Firestone for repairs that didn’t resolve the issue. That raises concerns about whether similar costs are unavoidable. Should I go back to NAPA since they did a diagnostic after the Firestone work and claimed the car was clean? I'm feeling overwhelmed — I've put all my savings into this car, and now I’m worried about further expenses. Best regards, Gaurav

Anonymous 2008-08-22 12:54

If budget were limited, I’d avoid Firestone or NAPA entirely. These shops aren’t known for advanced diagnostics. A dealership or a reputable independent mechanic with experience in Nissan vehicles would be better suited. The likelihood of identifying the issue correctly is much higher there. Given that the car runs but feels sluggish and lean, it’s likely pointing to a fuel delivery or timing problem. I’d suspect one of those two areas as primary causes.