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Nissan Maxima 2001 Engine Fault Codes P0174 and P0240 - Diagnosis and Repair Guide

Model: Nissan Maxima Fault Code: P0174 Posted: 2015-03-26 08:17

My 2001 Nissan Maxima 3.0L engine is showing fault codes P0174 and P0240. I'm looking for accurate diagnosis and repair steps for these specific OBD-II codes. P0174 refers to a lean air-fuel mixture in cylinder bank 2, while P0240 indicates an issue with the turbocharger boost sensor B circuit's range or performance. The vehicle has been running intermittently, and I want to confirm whether these codes are accurate for this model year and engine configuration.

Related fault codes

P0174P0240

Comments (2)

Anonymous 2015-03-26 08:19

Looking for a quick repair solution for fault codes P0174 and P0240 on my 2001 Nissan Maxima. Any recommended steps or parts to check?

Anonymous 2015-03-26 08:42

I double-checked the OBD-II code definitions: http://www.obd-codes.com/p0174 - this aligns with a lean condition in bank 2. However, P0240 (Turbocharger Boost Sensor B Circuit Range/Performance) seems inconsistent for this engine. Is it possible that this is actually a misdiagnosed code? Could it be a mix-up with P0420 (Exhaust Gas Recirculation - EGR) instead? Please confirm the correct sensor location and whether this code applies to the 3.0L V6 engine in a 2001 Maxima.