2001 Nissan Frontier Mil “On” Dtc P0420 Catalyst

2001 Nissan Frontier Mil “On” Dtc P0420 Catalyst

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If an applied vehicle has a MIL “ON” and the following DTC stored in the ECM: • P0420 Use the appropriate Service Procedure steps to determine if the bulletin applies to this vehicle. If the bulletin applies, complete the applicable Service Procedure steps to repair the incident, if it should occur. SERVICE PROCEDURE You will perform the following, as required: • Determine the DTC Stored in the 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). IMPORTANT: Do NOT replace the catalytic converters as part of this procedure. 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:A. If the ECM P/N in the vehicle matches one of those listed under “Current ECM P/N” in Chart A (above): • Look in the “Vehicle Configuration” column in Chart A (above) and determine the vehicle “configuration.” Make a note of the vehicle configuration and perform ECM Reprogramming on page 3. B. If the ECM P/N in the vehicle does not match one of those listed under “Current ECM P/N” in Chart A (above): • This bulletin does not apply. Use the appropriate Electronic Service Manual (ESM) to further diagnose and repair the incident.ECM Reprogramming 1. Perform ECM Reprogramming to install the latest available ECM data. • If you are unfamiliar with ECM Reprogramming, click here to link to the “ECM Reprogramming For Nissan Vehicles” general procedure or refer to “ECM Reprogramming For Nissan Vehicles” in the print copy of this bulletin. • For those familiar with ECM Reprogramming, perform the following: