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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 112 (Engine Controls Self-Diagnostics - Pathfinder) >> Diagnostic Tests >> DTC P0171: Bank 1 Fuel Injection System Too Lean Or DTC P0174: Bank 2 Fuel Injection System Too Lean >> DTC Confirmation Test (Using Generic Scan Tool)
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DTC Confirmation Test (Using Generic Scan Tool)

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start engine and warm to normal operating temperature. Turn ignition off and wait at least 10 seconds. Disconnect MAF sensor 5-pin harness connector. See Figure. Start engine and let it idle for at least 5 seconds. Turn ignition off and reconnect MAF sensor harness connector.
  2. Using scan tool, Select MODE 7, and ensure 1st trip DTC P0102 is detected. Select MODE 4 and erase DTC. Start engine and let it idle for at least 10 minutes. Select MODE 7. If 1st trip DTC P0171 or P0174 is detected, go to DIAGNOSTIC PROCEDURE . If 1st trip DTC is not detected, go to next step.
  3. If it is difficult to start engine, fuel injection system has a malfunction. Attempt to start engine while depressing accelerator pedal. If engine starts, go to DIAGNOSTIC PROCEDURE . If engine does not start, visually check for intake and exhaust leaks or spark plug fouling.
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