Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC P2227 [AJ] 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.
1		No	Record FREEZE FRAME DATA on repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Service Bulletins and/or online repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY STORED DTC Turn ignition switch to OFF, then ON (Engine off). Have DTC P2144 or P2145 been stored?	Yes	Inspect and repair DTC P2144 or P2145. (See DTC P2144 .) (See DTC P2145 .)
3		No	Go to the next step.
4	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA Is DTC P2227 on FREEZE FRAME DATA?	Yes	Go to the next step.
4		No	Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.
5	INSPECT CONNECTION OF EGR BOOST SENSING RELATED VACUUM HOSES Inspect the following vacuum hoses for loose, damage, improper connection and clogging. From EGR boost sensor to EGR boost sensor solenoid valve From EGR boost sensor solenoid valve to EGR pipe. Are they normal?	Yes	Go to the next step.
5		No	Repair or replace vacuum hose, then go to Step 9.
6	INSPECT EGR BOOST SENSOR SOLENOID VALVE AIR FILTER FOR CLOG Is EGR boost sensor solenoid valve air filter clogged?	Yes	Repair air clogging, then go to Step 9.
6		No	Go to the next step.
7	INSPECT EGR BOOST SENSOR SOLENOID VALVE Inspect EGR boost sensor solenoid valve. (See EGR BOOST SENSOR SOLENOID VALVE INSPECTION [AJ] .) Is there any malfunction?	Yes	Replace EGR boost sensor solenoid valve, then go to Step 9.
7		No	Go to the next step.
8	INSPECT EGR BOOST SENSOR Inspect EGR boost sensor. (See EGR BOOST SENSOR INSPECTION .) Is there any malfunction?	Yes	Replace EGR boost sensor, then go to the next step.
8		No	Go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P2227 COMPLETED Make sure to reconnect all disconnected connectors. Turn the ignition switch to the ON position. Clear the DTC from the memory using the WDS or equivalent. Run DRIVE MODE except MODE 4. (See OBD-II DRIVE MODE .) Stop vehicle. Is same DTC present?	Yes	Replace PCM, go to the next step. (See PCM REMOVAL/INSTALLATION .)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
10		No	Troubleshooting completed.