6 V6-3.7L (2009)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls/Emissions - MIL ON/DTC P0456 Set
Bulletin No: 01-024/09
Last Issued: 06/24/2009
Subject:
MIL ILLUMINATION WITH DTC P0456:00
APPLICABLE MODEL(S)/VINS
2009 Mazda6 vehicles produced before March 15, 2009
DESCRIPTION
Some vehicles may experience a MIL Illumination with a DTC P0456:00 due to low battery voltage.
DTC P0456:00 - EVAP System Leak Detection (very small leak)
When the battery voltage is too low, the EVAP system leak is detected due to the Canister Vent Solenoid Valve (CVV) (A) being kept open.
^ 2.5L: EVAP system leak detection strategy has been updated to prevent mis-detection during low battery voltage.
^ 2.5L / 3.7L: The specifications to close the CVV (A) has been updated.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
^ 2.5L Engine: Proceed to Step 1 for PCM Reprogramming, then to Step 4 for Canister Vent Solenoid Valve (CVV) replacement.
^ 3.7L Engine: Proceed to Step 4 for Canister Vent Solenoid Valve (CVV) replacement.
NOTE:
It is not necessary to reprogram a 3.7L PCM as part of this repair.
1. Reboot the IDS to clear memory before reprogramming.
2. Using IDS 60.13 or later OR 61.05 or later software, reprogram the PCM to the latest calibration (refer to "Calibration Information" table) by
following the "Module Reprogramming" procedure.
NOTE:
^ Always update the IDS tool first, then follow on-screen instructions to download the needed calibration file for PCM reprogramming.
^ It is not necessary to remove any fuses or relays during PCM reprogramming when the IDS screen prompts you to do so. You may accidentally stop
power to one of the PCM terminals and cause the PCM to be blanked, or you may receive error messages during the IDS reprogramming procedure.
^ IDS shows the calibration part numbers after programming the PCM.
