1999-2001 Infiniti Q45 (FY33) MIL “ON” REAR O2 SENSOR DTC

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Filed Under (Infiniti) by Doe Namblas on 10-01-2014

Download 1999-2001 Q45 (FY33) SERVICE INFORMATION If a 1999, 2000, or 2001 Q45 has a MIL “On” and any of the following DTCs stored in the ECM: • P0138 Heated Oxygen Sensor 2 (Rear) (Bank 1) (Max. Voltage Monitoring) • P0139 Heated Oxygen Sensor 2 (Rear) (Bank 1) (Response Monitoring) • P0140 Heated Oxygen Sensor 2 (Rear) (Bank 1) (High Voltage) • P0158 Heated Oxygen Sensor 2 (Rear) (Bank 2) (Max. Voltage Monitoring) • P0159 Heated Oxygen Sensor 2 (Rear) (Bank 2) (Response Monitoring) • P0160 Heated Oxygen Sensor 2 (Rear) (Bank 2) (High Voltage) Start with the Service Procedure to find out if the bulletin applies to this vehicle. If it does apply, complete the Service Procedure to repair the incident, if it should occur. SERVICE PROCEDURE You will be performing the following, as required: • Determine the DTC Stored in ECM from the CONSULT-II Self-diagnosis results. • ECM Part Number Check to determine if this bulletin applies. • ECM Reprogramming (required if the ECM P/N in the vehicle matches one of those listed under “Current ECM P/N” in Chart A -page 2). • Replacing the Rear Oxygen Sensor (required if ECM Reprogramming is needed). Determine the DTC Stored in ECM: 1. Determine which DTC code is stored in the vehicle’s ECM by performing CONSULT-II Self-Diagnosis. 2. Print out the Self-Diagnosis results for use in ECM Part Number Check , below. See Figure 1 for an example of the CONSULT-II Self-Diagnosis printout. ECM Part Number Check 1. Compare the vehicle’s current ECM P/N (from your CONSULT-II Self Diagnosis printout) to those shown under Current ECM P/N in Chart A , below: Chart A – Current ECM P/N’s: Vehicle Current ECM P/N 1999-2001 Q45 23710-3H000, -3H001, -3H005, -3H006, -3H007 A. If the ECM P/N in the vehicle matches one of those listed under “Current ECM P/N” in Chart A (above): • Perform ECM Reprogramming on page 3.

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