Engine Controls/Emissions - MIL ON/DTC P0456 Set
Bulletin No: 01-024/09Last 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.
^ Please be aware that PCM calibration part numbers and file names listed in any Service Bulletin may change due to future releases of IDS software, and additional revisions made to those calibrations for service related concerns.
^ When reprogramming a PCM, IDS will always display the "latest" calibration P/N available for that vehicle. If any calibration has been revised/updated to contain new information for a new service concern/issue, it will also contain all previously released calibrations.
^ When performing this procedure, we recommend that a battery charger be installed on the vehicle battery and turned ON to a maximum charge of no more than 20 AMPS to keep the vehicle battery up to capacity. If you exceed 20 AMPS, it could damage the VCM.
3. After performing the PCM reprogramming procedure, verify the repair by starting the engine and making sure there are no MIL illumination or abnormal warning lights present.
NOTE:
^ If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the appropriate Troubleshooting section of the Workshop Manual.
^ After PCM reprogramming, it is no longer necessary to road test the vehicle to "relearn" KAM (Keep Alive Memory).
4. 2.5L / 3.7L: Remove Charcoal Canister according to MS3 online instructions or Workshop Manual (section 01-16A CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT REMOVAL/INSTALLATION [L5]) or (section 01-16B CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT REMOVAL/INSTALLATION [MZI-3.7]).
5. Remove Canister Vent Solenoid Valve (CVV) from Charcoal Canister.
CAUTION:
Be careful not to damage the pipes connected to the Canister Vent Solenoid Valve (CVV) during removal from the Charcoal Canister.
a. Remove cover (A) by pressing two (2) clips (B).
b. Remove bracket (A), with CVV and filter (B) together from canister body.
c. Remove hose clamp and hose from CVV.
d. Install new CVV to canister body in reverse order.
6. Reinstall Charcoal Canister according to MS3 online instructions or Workshop Manual (section 01-16A CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT REMOVAL/INSTALLATION [L5]) or (section 01-16B CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE, AIR FILTER COMPONENT REMOVAL/INSTALLATION [MZI-3.7]).
PART(S) INFORMATION
CALIBRATION INFORMATION
WARRANTY INFORMATION
NOTE:
^ This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
^ This repair will be covered under Mazda's New Vehicle Limited Warranty term for a Powertrain Component.
^ Additional diagnostic time cannot be claimed for this repair.
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