Dtc P0125 [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Is there continuity?
VERIFY TROUBLESHOOTING OF
DTC P0123 COMPLETED
• Make sure to reconnect all
disconnected connectors.
• Clear the DTC from the PCM
11
memory using the WDS or
equivalent.
• Start the engine.
• Is same DTC present?
VERIFY AFTER REPAIR
PROCEDURE
• Perform "After Repair Procedure".
12
(See AFTER REPAIR PROCEDURE
[LF].)
• Are any DTC present?
DTC P0125
• The PCM monitors the ECT sensor signal at PCM terminal 2AK after engine is
started while the engine is cold. If the engine coolant temperature does not reach the
expected temperature for specified period, the PCM determines that it has taken an
excessive amount of time for the engine coolant temperature to reach the temperature
necessary to start closed-loop fuel control.
Diagnostic support note
• This is a continuous monitor (CCM).
DETECTION
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive
CONDITION
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 first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
• ECT sensor malfunction
• Poor connection of connectors
POSSIBLE
CAUSE
• PCM malfunction
Diagnostic procedure
Downloaded from
Replace the PCM, then go to the next step.
Yes
(See
No Go to the next step.
Go to the applicable DTC troubleshooting.
Yes
(See
No Troubleshooting completed.

DTC P0125 [LF]

Excessive time to enter closed loop fuel control
https://carmanualshub.com/
PCM REMOVAL/INSTALLATION
DTC TABLE [LF].)
- automotive repair manuals website
[LF].)
B3E010201084W18