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I got my first SES light on and took it in to the dealer last week. Car has 32,459 miles on it. They looked at it and found no "hard faults" checked and cleaned a few things and gave the car back. A few days later the SES light came on again. All along, the car is running perfectly.
Here is what the dealer's summary says verbatim:
CUST. STATES SERVICE ENGINE LIGHT ON
CONFIRMED CHECK ENGIN ELIGHT ON. RAN VEHICLE TEST FOUND
FAULTS FOR SCR SYSTEM EFFICIENCY. RAN RELATED TEST PLANS.
FOUND NO HARD FAULTS FOR SCR SYSTEM. INSTRUCTED TO CHECK
SCR SYSTEM COMPONENTS. REMOVED UNDER BODY PANELS FOUND ALL
LINES AND CONNECTIONS. OK. REMOVED METERING VALVE. OK.
RINSED WITH WATER. TOPPED OFF BOTH ACTIVE ANS PASSIVE DEF
TANKS. (OVER 2 GALLONS). RAN TEST PLAN FOR REFUEL DETECTION.
RAN TEST PLAN FOR PRE CONDITION RUN. TOOK VEHICLE ON
CONDITION RUN TO ENABLE NOx SENSORS. RAN SCR SYSTEM TEST. OK
FOUND NOx SENSOR IN RANGE AND SCR SYSTEM WORKING NORMAL.
DIAG CODE: D1170-000000000-03-901
00-00-556 2 FRU + 61-00-006 25 FRU.
The car uses DEF fluid more than expected over its life and I have varied how it is driven quite a bit. Texaco/Chevron with no additives all the way except for one time right before this when car was sitting a while used Sta-Bil Diesel Fuel Stabilizer in proper dosage for one tank.
I'm not interested in changing cars but would entertain all thoughts and technical solutions. The car is going back to the dealer later this week.
PL
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