Dtc P2188 [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Is fuel injector normal?
VERIFY TROUBLESHOOTING OF DTC
P2187 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS
or equivalent.
16
• Perform the PCM Adaptive Memory
Produce Drive Mode.
(See OBD DRIVE MODE
• Is the PENDING CODE for this DTC
present?
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
17
(See AFTER REPAIR PROCEDURE
• Is there any DTC present?
DTC P2188
• PCM monitors short term fuel trim (SHRTFT), long term fuel trim (LONGFT) during
closed loop fuel control at idle. If the LONGFT or the sum total of these fuel terms
exceed preprogrammed criteria. PCM determines that fuel system is too rich at idle.
Diagnostic support note
• This is a continuous monitor. (FUEL SYSTEM)
• MIL illuminates if PCM detects the above malfunctioning condition in two
DETECTION
consecutive drive cycles or in one drive cycle while the DTC for the same malfunction
CONDITION
has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction conditions
during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
• Misfire
• Front HO2S deterioration
• Front HO2S heater malfunction
POSSIBLE
CAUSE
• MAF sensor malfunction
• Pressure regulator (built-in fuel injection pump) malfunction
Downloaded from
Yes
No Go to the next step.
[LF].)
Yes
[LF].)
No Troubleshooting completed.

DTC P2188 [LF]

Fuel system too rich at idle
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Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION
Go to the applicable DTC inspection.
(See DTC TABLE [LF].)
- automotive repair manuals website
[LF].)
B3E010202100W04