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Crown C5:
637.02

Event 637.02, I found a coolant leak right over an electrical connector. I cleaned that and tightened hoses but I think the thermostat may be bad also. I don't know what that code is for

• Posted 28 May 2025 00:31
• Discussion started by Bill_Dipierro
• New Jersey, United States

Bill Dipierro

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Event 637.02 on a C5 with an AN20 engine indicates an issue with the crankshaft posotion sensor (Crankshaft position sensor noise is detected). I'm guessing the hot coolant damaged the wiring for that sensor or the sensor itself. Causing it to short or have high resistance.

• Posted 28 May 2025 00:49
• Reply by DyslexicNerd_01
• Wisconsin, United States

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