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Did you make it to the end of the R/M PDF??

6. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
(e) Start the engine and idle it for 10 seconds or more.
(f) Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
(g) Read the DTCs.
Result
RESULT PROCEED TO
No DTC is output (A)
P0340, P0342 or P0343 is output (B)
HINT:
If the engine does not start, replace the ECM.
(B) REPLACE ECM
(A) END
 

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there may be other issues too....

All I have are pieces of paper to help, but the expierience of a technician may be benificial before buying an ECU.....just in case
 

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Discussion Starter #25
I am wondering if the maf and can sensors share the same harness/wiring, I have been hearing a buzzing noise near the throttle body... If wondering if something else may be the cause of these dtcs...

I may have some time in the next few days to check that
 

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Discussion Starter #26
So my security light still flashes, just the occasional one blink, no codes....

Is there a procedure to marry the key to the ecu? Or to sync the used immobilizer to the ecu?
 
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