Exhaust System - MIL ON/DTC's P013A/P013C

Bulletin No: 01-014/10

Last Issued: 02/26/2010

Subject:
MIL ON - DTC P013A AND/OR P013C SET

BULLETIN NOTE

* ^ This bulletin supersedes the previous bulletin 01-014/10 issued on 02/15/10. The WARRANTY INFORMATION has been revised.

^ Changes are noted below in asterisk and Red beside the change bar.*

APPLICABLE MODEL(S)/VINS

2009-2010 Tribute equipped with 3.0L engine and built between 10/01/2008 and 11/20/2009

DESCRIPTION

Some vehicles may exhibit the malfunction indicator lamp (MIL) illuminated with diagnostic trouble code (DTC) P013A - 02 sensor slow response, rich to lean - bank 1/sensor 2 and/or P013C - 02 sensor slow response, rich to lean - bank 2/sensor 2. This may be due to an exhaust leak in the Y-pipe at the bank 1 flange area.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

NOTE:
DTC P013A/PO13C INDICATING A LACK OF SWITCH ARE TYPICALLY A RESULT OF EXHAUST LEAKS OR EXHAUST MODIFICATIONS. EXHAUST LEAKS OR EXHAUST MODIFICATIONS WILL CAUSE CATALYST MONITOR SENSOR (CMS) VOLTAGE READINGS TO BE OUT OF RANGE.

THE CMS SENSOR IS THE LEAST LIKELY CAUSE.

1. Verify customer concern.








2. Inspect the bank 1 Y-pipe flange area weld for leaks. (Figures 1 - 2)

3. Restrict exhaust flow at the tailpipe, and look for carbon soot/moisture witness marks indicating a leak at the bank 1 flange area. Is a leak present?

NOTE:
PRESSURIZING EXHAUST SYSTEM AND USING SOAPY WATER SPRAY SOLUTION WILL GREATLY INCREASE ABILITY TO CONFIRM SMALL DIFFICULT TO DETECT EXHAUST SYSTEM LEAKS.

a. Yes - replace the Y-pipe assembly. Refer to M53 online or Workshop Manual (section 01-15B EXHAUST CROSSOVER PIPE REMOVAL/INSTALLATION - 3.0L).

b. No - the procedure does not apply. Proceed with M53 online or Workshop Manual (section 01-01A HEATED OXYGEN SENSOR (H025) HEATER CIRCUIT).

4. Verify repair.