Engine Controls/Exhaust - MIL ON/DTC P1283/Ticking Noise

Classification:
EC03-031a

Reference:
NTB04-019a

Date:
April 19, 2004

2004 MAXIMA/QUEST, 2005 ALTIMA; MIL "ON" P1283 (LEAN B2) OR EXHAUST 'TICKING' NOISE

The Applied Vehicles and Parts Information have been amended. Please discard all previous copies of NTB04-019.

APPLIED VEHICLES:
2004 Maxima (A34)
2004 Quest (V42)
2005 Altima (L31) - with VQ35 Engine ONLY

IF YOU CONFIRM:

An Applied Vehicle has the following:

^ MIL "ON" with DTC P1283 (A/F Sensor B2) stored, and/or

^ An exhaust 'ticking' noise coming from the engine compartment area.

ACTIONS








a. Inspect the 6 bolts attaching the heat shield to the B2 catalyst to see if any are missing or loose (see Figures 1 and 2 shown).

b. Replace any missing or loose bolts with the self-locking bolt listed in the parts section.

c. Tighten bolts to the following torque spec: 6.5 Nm (0.7 kg-m, 58 in-lb).

d. Clear the DTC P1283, as needed, with CONSULT-II.

NOTE:
All 6 of the bolt holes go completely through to the inside of the B2 catalyst. When any of the 6 bolts are loose or missing, an exhaust leak and/or noise may be produced.





PARTS INFORMATION





CLAIMS INFORMATION

NOTES:
^ The exhaust front tube and catalyst do not need to be removed to repair this incident.

^ They are shown removed only to point out the location of the heat shield bolts.





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