Engine Controls - MIL ON/DTC P0448 Set

Classification: EC11-011

Reference: NTB11-031

Date: March 24, 2011

2007-2011 ALTIMA HYBRID; MIL 'ON' WITH DTC P0448

APPLIED VEHICLES: 2007- 2011 Altima Hybrid (L32H)

IF YOU CONFIRM

DTC P0448 is the only code stored in the ECM.

AND

The vehicle is equipped with a Vent Control Valve Filter (see Figure below, shown with Right Rear Wheel removed).





NOTE:
If the vehicle is not equipped with a Vent Control Valve Filter then NIB10-057 may also apply.

ACTIONS

1. Refer to Step 2 in the Service Procedure to confirm this bulletin applies to the vehicle you are working on.

2. If this bulletin applies, reprogram the ECM.

IMPORTANT:
The purpose of ACTIONS (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire Service Procedure as it contains information that is essential to successfully completing this repair.





CLAIMS INFORMATION

SERVICE PROCEDURE

1. Connect C-III to the vehicle to begin the reprogramming procedure.





CAUTION





2. When you get to the ECM Reprogramming screen shown in Figure 1, confirm this bulletin applies as follows:

A. On your C-III screen, look at the Part Number column (see Figure 1).

^ If this column is blank (no part number listed), this bulletin does not apply. Close C-III and refer to ASIST for further diagnostic information.

^ If a Part Number is listed, write it on the Repair Order.





B. Compare the Part Number you wrote down to the numbers in the Current ECM Part Number column in Table A.

^ If there is a match, this bulletin applies. Continue with the reprogramming procedure.

NOTE:
If there are two lines (two reprogramming options) on your C-III screen, use the one that does not have the message "Caution! Use ONLY with NTBXX-XXX".

^ If there is not a match, this bulletin does not apply. Close C-III and refer to ASIST for further diagnostic information.





3. If this bulletin applies and you have performed ECM reprogramming, the screen in Figure 2 displays when reprogramming is complete.

NOTE:
If the screen in Figure 2 does not display (reprogramming does not complete).

4. Make sure to erase DTCs from all Systems.

NOTE:
During the reprogramming, DTCs will set in several systems. DTCs must be erased from all systems.

5. Test drive the vehicle and make sure it operates correctly and the MIL is OFF.

^ If the MIL comes ON, go back to ASIST for further diagnostic information.

^ Diagnosis and repairs beyond the ECM reprogramming are not covered by this bulletin.