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How To: Reading Check Engine Light (CEL) With Code List

Engine Tech / Drivetrain DIY How-To's

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Old 11-27-2008, 07:17 PM   #16
95 EJ Coupe
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Originally Posted by maguiver77 View Post
Ok guys have a question for you. I was driving on the freeway and noticed my check engine came on. Then noticed that my water temp was pegged. I pulled over immediately and noticed steam. I popped the hood and noticed coolant all over the place. The radiator cap was not hot so I figured I blew a hose. I popped the cap and no coolant. So after letting it cool down for a bit a added some water and it started steaming. I put the radiator cap on and noticed steam coming from the engine ( it appeared to be from the engine) Couldn't really tell. After starting the car there was no smoke coming from the exhaust so I dont think i blew a head gasket. What do you think?
After getting towed home, I jumped the 2 pin connector and got flashes( 6 - ECT Sensor (Engine Coolant Temperature). Now could a faulty sensor cause the ecu to do something and make it over heat, or did the sensor go bad from the over heating?

Anyone ever have a problem like this? Could a thermostat be the problem? Thanks for any help.
Your ECU can't/will never tell your engine to dump coolant. You have a serious problem though. Check your water pump.
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Old 10-30-2011, 09:38 PM   #17
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Hey guys my CEL light came on and showed this code:

41 Primary oxygen sensor heater

I replaced my oxygen sensor and the CEL came on again with that code. is the o2 sensor I bought faulty? it was a cheaper brand... or would it have something to do with the wiring to the sensor. I also noticed that there are these codes:

1 O2A - Oxygen sensor #1
61 Primary oxygen sensor

so does code 41 necessarily mean it's the o2 sensor that's faulty or is it something else? I imagine that if it was the o2 sensor that was messed up it would show either code 1 or 61. Any help on this would be greatly appreciated.
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