Code question
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Senior Member
Joined: Apr 2009
Posts: 234
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From: Fredericksburg, VA
Vehicle: 2002 Hyundai Accent GS
Code question
I am getting no luck finding information on HMAService.com for these three codes. Not sure if these codes had anything to do with the crank sensor going bad or not. Anyone have any ideas?
*System too Rich Bank 1
*Ho25 Bank 1 Sen 2 Heater Circuit
*Po650 MIL Control Circuit Malfunction
*System too Rich Bank 1
*Ho25 Bank 1 Sen 2 Heater Circuit
*Po650 MIL Control Circuit Malfunction
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Joined: Mar 2006
Posts: 12,515
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From: Lacey, WA
Vehicle: Two Accents, Mini, Miata, Van, Outback, and a ZX-6
The rich code is because the ECU's long term fuel trim is consistently pulling too much fuel for the ECU to be happy. Probably -20 or more on the LTFT.
Bank 1 sensor 2 heater circuit says that your downstream O2 sensor's heater isn't working. It could contribute to the rich code.
The MIL control circuit malfunction code means that when the ECU tried to light the CEL it had issues. Such as no bulb or too much resistance on the circuit physically lighting the CEL bulb.
Bank 1 sensor 2 heater circuit says that your downstream O2 sensor's heater isn't working. It could contribute to the rich code.
The MIL control circuit malfunction code means that when the ECU tried to light the CEL it had issues. Such as no bulb or too much resistance on the circuit physically lighting the CEL bulb.
Thread Starter
Senior Member
Joined: Apr 2009
Posts: 234
Likes: 0
From: Fredericksburg, VA
Vehicle: 2002 Hyundai Accent GS
QUOTE (187sks @ Apr 11 2010, 04:34 AM)
The rich code is because the ECU's long term fuel trim is consistently pulling too much fuel for the ECU to be happy. Probably -20 or more on the LTFT.
Bank 1 sensor 2 heater circuit says that your downstream O2 sensor's heater isn't working. It could contribute to the rich code.
The MIL control circuit malfunction code means that when the ECU tried to light the CEL it had issues. Such as no bulb or too much resistance on the circuit physically lighting the CEL bulb.
Bank 1 sensor 2 heater circuit says that your downstream O2 sensor's heater isn't working. It could contribute to the rich code.
The MIL control circuit malfunction code means that when the ECU tried to light the CEL it had issues. Such as no bulb or too much resistance on the circuit physically lighting the CEL bulb.
Awesome. Thank you. Nothing to be too worried about. Except I may have to buy another o2 sensor down the road. blink.gif
