Check engine light will it flash one single time when you initially turn ignition key on

1998 MERCURY MOUNTAINEER
330,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
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DOUGLAS CHEEK
  • MEMBER
  • 1 POST
When all codes are eliminated check engine light stays off while running will it flash one single time when you initially turn ignition key on.
Jul 19, 2019 at 9:21 PM
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BMDOUBLE
  • ✓Experienced Mechanic
  • 1,139 POSTS
Yes that is normal, if I understand you correctly. Get in, start the vehicle, cel light initially comes on then turns off, normal operation, it is a prove out for the warning lamp.
Jul 20, 2019 at 12:29 AM
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