Mazda 3 - Dtc P0012 [Z6]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Downloaded from https://carmanualshub.com/ - automotive repair manuals website
47
DTC P0012 [Z6]
B3E010200001W02
DTC P0012
CMP-timing over-retarded
DETECTION
CONDITION
• The actual valve timing is over-retarded from the target valve timing when the OCV
system control is within feed-back range.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in two
consecutive drive cycles or in one drive cycle while the DTC for the same
malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition
during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE
CAUSE
• Low engine oil pressure
• OCV malfunction
• Spool valve in OCV is stuck in retard position.
• Variable valve timing actuator is stuck in retard position.
• Following oil runners are clogged or have leakage.
Oil runners
• Between oil pressure switch and OCV
• Between OCV and variable valve timing actuator
• In variable valve timing actuator
• Loose timing chain or improper valve timing due to timing chain slippage
• PCM malfunction
Diagnostic procedure
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
• Has FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair
order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Yes
Perform repair or diagnosis according to the
available repair information.
• If the vehicle is not repaired, go to the next step.