Emissions Issue: MIL ON/DTC P0456 Set in the MKZ AWD V6-35L (2008) Engine Control Module
IF THE LEAK IS IN THE FILLER NECK NEAR THE FUEL TANK FILLER PIPE BRACKET, SMOKE UNDER PRESSURE MAY NOT
REACH THIS LEAK. REMOVAL OF FUEL CAP TO ALLOW SMOKE TO ENTER FILLER PIPE IS NECESSARY. REFER TO
POWERTRAIN CONTROLS/EMISSIONS DIAGNOSIS (PC/ED), STEP HX47 FOR ADDITIONAL INFORMATION. USE OF HIGH
INTENSITY LIGHTING (Q-BEAM) IS ALSO A RECOMMENDED DIAGNOSTIC TOOL FOR DETERMINING EVAPORATIVE SYSTEM
LEAKS. A HYDROCARBON (COMBUSTIBLE GAS) DETECTOR CAN BE AN EFFECTIVE MEANS TO LOCATE LEAK(S) IN
LOCATIONS WHERE SMOKE EXIT IS NOT VISIBLE, SUCH AS TOP OF FUEL TANK (DO NOT USE REFRIGERANT LEAK
DETECTOR).
4. If root cause of evaporative emission system leak is unconfirmed following diagnostic routines detailed in this procedure.
a. Replace the canister vent valve (CVV) solenoid with current service level part.
b. Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 63.04 and higher. This new calibration is not
included in the VCM 2009.9 DVD. Calibration files may also be obtained at the website.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION
DESCRIPTION
TIME
MT092011
Use SLTS Operations If
Actual
Available; Claim Additional
Time
Diagnosis Or Labor
Performed As Actual Time
DEALER CODING
CONDITION
BASIC PART NO.
CODE
9F945
42
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