Check engine light
Ultimate HDF Member
Joined: Aug 2010
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From: Northern California
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Joined: May 2018
Posts: 56
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From: Norwalk, CT
If my check engine light stays on a second or two after start... Does that mean something without needing a fancy doohickie to check codes? I could swear it's a light check when you first start, but every once in awhile it sticks around a few ticks.
Ultimate HDF Member
Joined: Aug 2010
Posts: 5,014
Likes: 739
From: Northern California
CHECK ENGINE LAMP
When the lamp turns off after being illuminated for the first four-second period, it will:
a. remain off if there are no fault conditions or trouble codes currently detected by the Ignition Control Module.
b. come back on for an 8-second period if only historic codes exist.
c. come back on, and remain on, if a current trouble code exists.
When the lamp turns off after being illuminated for the first four-second period, it will:
a. remain off if there are no fault conditions or trouble codes currently detected by the Ignition Control Module.
b. come back on for an 8-second period if only historic codes exist.
c. come back on, and remain on, if a current trouble code exists.
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