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• Have your vehicle professionally
serviced. Codes indicate problems
found by the computer.
or,
• Repair the vehicle yourself using
service codes to help pinpoint the
problem. Refer to Test Results
Chart.
Key On Engine Off (KOEO) Test Results
KOEO
CODES
ACTION TO TAKE:
11*
System pass. No problem found by computer during KOEO Self-
(all except
Test. Go to SELF-TEST PART 3: Key On Engine Running
high altitude)
(KOER) Self-Test.
62*
System pass. No problem found by computer during KOEO Self-
(high altitude V-6
Test. Go to SELF-TEST PART 3: Key On Engine Running
or V-8 ONLY)
(KOER) Self-Test.
65*
System pass. No problem found by computer during KOEO Self-
(high altitude
Test. Go to SELF-TEST PART 3: Key On Engine Running
I-4 ONLY)
(KOER) Self-Test.
Any Code(s)
Codes indicate system problems are present now. Write down all
codes. Refer to vehicle service manual for code troubleshooting
charts and repair procedures. Repeat PART 2: Key On Engine
Off (KOEO) Self-Test after every repair. Do not proceed to SELF-
TEST PART 3 until a system pass code is received.
No Codes
You have a problem which must be repaired before proceeding.
Received
Refer to the vehicle service manual “Self-Test Not Functional” (or
(STO light
similar title) troubleshooting chart.
always
on or off)
*Note: “High Altitude” refers to vehicles with computer adjusted for operation at high
elevations such as in Denver, Colorado.