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94 Metro, CEL code 51
Topic Started: Dec 24 2016, 07:48 PM (233 Views)
ajb543
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51 - EGR System & REGT Sensor Circuit

Got this from the Check Engine Light Guide. What does this mean? How do I diagnose/fix this?
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freegeo
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Most of the time it is a blocked passage or plugged up egr valve.

Here is a link to the 94 FSM. Look in section 6E2-A1 ENGINE COMPONENTS WIRING DIAGRAMS DIAGNOSTIC CHARTS. Starts on page 54.

http://geometroforum.com/topic/5044844/1/#new
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ajb543
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Thanks, I read through page 54-55. The diagnosis flowchart seems helpful but I have some questions. How do I access the ECM? What is a test light?
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ajb543
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Nevermind I did more research and found out. Thanks for the link.
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