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HOMESERVICE MANUALSHONDA2011CR-V EX, 2.4 RE3, BZJAREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMADVANCED DIAGNOSTICSDTC P0171: FUEL SYSTEM TOO LEANDRIVING PATTERN
2011 Honda CR-V EX, 2.4 RE3, BZJA

Driving Pattern

2011 Honda CR-V EX, 2.4 RE3, BZJASECTION Driving Pattern
  1. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.
  2. Drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for at least 15 minutes, and watch the long term fuel trim. If the long term fuel trim stays at about 1.0, the vehicle is OK or it is a very minor problem. If a significant fault is still present, the long term fuel trim will move up or down while driving.
  • When freeze data is stored, drive the vehicle under those conditions instead of Driving Pattern step 2.
  • If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart.
  • After clearing the DTC by disconnecting the battery or using the scan tool, extend Driving Pattern step 2 to 40 minutes or longer to allow time for long term fuel trim to recover.
  • Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.