Engine Controls - MIL ON/DTC's P1172/P2A00 Stored

07-019

October 22, 2011

Applies To:
2005-06 RSX - ALL

MIL Is On With DTC P1172 or P2A00

(Supercedes 07-019, dated July 22, 2011, to update the information marked by black bars and asterisks.)

REVISION SUMMARY

*Under WARRANTY CLAIM INFORMATION, a flat rate time was changed.*

SYMPTOM

The MIL is on with PGM-FI DTC P1172 (air fuel sensor [sensor 1] circuit out of range, high) and/or P2A00 (air fuel sensor [sensor 1] circuit range/performance problem) stored.

PROBABLE CAUSE

The air/fuel sensor is damaged by moisture in the exhaust system during engine warm up.

CORRECTIVE ACTION

*Update the PGM-FI software with the HDS. Replace the air/fuel sensor.*

NOTE:
The PGM-FI software has been changed to delay the operation of the A/F sensor heater when there is a high probability of moisture in the exhaust system.

PARTS INFORMATION

Air/Fuel Sensor:

Base model with M/T: P/N 36531-PND-A21

Base model with A/T: P/N 36531-PNE-003

Type-S: P/N 36531-PRB-A11

SOFTWARE INFORMATION

HDS Software Version: 2.006.019 (blue) or later.

NOTE:
If you use an earlier HDS software version, the HDS may incorrectly indicate that the vehicle does not need an update when it actually does.





The updated PGM-FI software program IDs and P/Ns are shown. If these, or later program IDs, are the Current Program ID displayed during the update, the software for this service bulletin is already installed.





WARRANTY CLAIM INFORMATION

REPAIR PROCEDURE

1. Retrieve the DTCs.

*2. Update the PGM-FI software with the HDS. Refer to Service Bulletin 01-026, Updating Control Units/Modules.*

3. Replace the air/fuel sensor:

^ Refer to page 11-279 of the 02-06 RSX Service Manual, or

^ Online, enter keyword A/F and select A/F Sensor Replacement from the list.





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