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Emission light stays on and occasionally goes off but comes back on again how can this be rectified?
Wiki User
∙ 14y ago
You need to pull the Diagnostic Trouble Codes up with a code reader or scanner and fix the problem in the emission system that is causing it. Could be a cracked or missing hose, defective part, vacuum leak in the system or EGR valve.
Because it is a Ford, you really do need a code reader to pinpoint your problem, because Ford's have 3 types of codes: 1) Intermittent (which sounds like your problem since the light goes on and off) 2) Hard Code or Constant, and 3) Memory Codes (meaning it has occurred enough and has stored in memory. These are the general descriptions, as opposed to the technical ones you would get from a manual.
A code reader/scanner is the best way of doing a better job of pinpointing the culprit causing your flashing engine light.
Wiki User
∙ 14y ago
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