Testing An AFR/O2 Heater Circuit
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Date: 2020-08-05
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Comments and reviews: 10
kd9bwi
Hey Mr. O, couldn't find out how to message you. Got a question. Can I troubleshoot missfires using O2 readings? I'm using torque pro and an Elm32 as I didn't have a fancy scan tool yet, and my '99 GMC Sonoma has been missfiring. No codes yet but the missfire is noticible, engine shakes and so does my stick, you can hear it missfire sometimes also. O2 data shows voltage drop spikes in primary O2 voltage on and off idle, sometimes almost down to 0v. I'd send you a screenshot of the data, bit again, can't find out how to message you. If I'm correct, I think I have a clogged or bad fuel injector. Engine vin is 4 if that helps any. Thanks!
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Hey Mr. O, couldn't find out how to message you. Got a question. Can I troubleshoot missfires using O2 readings? I'm using torque pro and an Elm32 as I didn't have a fancy scan tool yet, and my '99 GMC Sonoma has been missfiring. No codes yet but the missfire is noticible, engine shakes and so does my stick, you can hear it missfire sometimes also. O2 data shows voltage drop spikes in primary O2 voltage on and off idle, sometimes almost down to 0v. I'd send you a screenshot of the data, bit again, can't find out how to message you. If I'm correct, I think I have a clogged or bad fuel injector. Engine vin is 4 if that helps any. Thanks!
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Ricardo
Hey Eric thanks so much for this video, wonderful job! I wanted to ask you about my own Toyota Camry it's in need of its timing belt and I purchased the Dayco timing belt and water pump kit. I know from other videos you've mentioned that this isn't the best kit to get and you've recommended the Aisin brand kit. I'm unable to return the Dayco kit so the question is do you recommend using any of the components at all? I'd like to change the timing belt at the very least. do you recommend switching out the original water pump for the Dayco pump or just do the timing belt? what's your recommendation if all I have is the Dayco kit. Thanks
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Hey Eric thanks so much for this video, wonderful job! I wanted to ask you about my own Toyota Camry it's in need of its timing belt and I purchased the Dayco timing belt and water pump kit. I know from other videos you've mentioned that this isn't the best kit to get and you've recommended the Aisin brand kit. I'm unable to return the Dayco kit so the question is do you recommend using any of the components at all? I'd like to change the timing belt at the very least. do you recommend switching out the original water pump for the Dayco pump or just do the timing belt? what's your recommendation if all I have is the Dayco kit. Thanks
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Anonymous98
Thanks for the tip. Not sure what vehicle you are working on (assume a Toyota) so my question is - Is the P1135 code indicating an Air Fuel Sensor heater circuit response fault common to all vehicles, or just toToyotas and their ilk? I ask because on Fords and Lincolns, for example, this code is for an intermittent fault on Pedal Position Sensor Circuit A, while on some others this code is for a fuel timing servo malfunction.
Inquiring minds want to know what you know.
Thanks again for this tip and for the practical demonstration of the usefulness of the test lights you showed us how to make last week.
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Thanks for the tip. Not sure what vehicle you are working on (assume a Toyota) so my question is - Is the P1135 code indicating an Air Fuel Sensor heater circuit response fault common to all vehicles, or just toToyotas and their ilk? I ask because on Fords and Lincolns, for example, this code is for an intermittent fault on Pedal Position Sensor Circuit A, while on some others this code is for a fuel timing servo malfunction.
Inquiring minds want to know what you know.
Thanks again for this tip and for the practical demonstration of the usefulness of the test lights you showed us how to make last week.
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Michael
Eric the tips you provide a great and the videos are even better. I am a 20 year mechanic w/Toyota but I watch the videos on all makes and models because your explanations on the theory and operation are thorough and folks can understand the process we go through each day. I even have new trainees look at some of them because seeing is believing and you do a great job. Keep up the good work and best wishes from down south a bit in Maryland.
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Eric the tips you provide a great and the videos are even better. I am a 20 year mechanic w/Toyota but I watch the videos on all makes and models because your explanations on the theory and operation are thorough and folks can understand the process we go through each day. I even have new trainees look at some of them because seeing is believing and you do a great job. Keep up the good work and best wishes from down south a bit in Maryland.
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1970chevelle396
Great to see you test that. Most people just replace the sensor without testing it. I had one mini van I worked on a while back. The motor mount was broken and it pulled on the wires breaking one wire inside of the insulation causing that heater circuit code.
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Great to see you test that. Most people just replace the sensor without testing it. I had one mini van I worked on a while back. The motor mount was broken and it pulled on the wires breaking one wire inside of the insulation causing that heater circuit code.
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scuba422123
eric. I get the testing. and a good tech needs to know. but in the real world on a Toyota blow a sensor in and move on! I have worked at a chevy dealer 25 years and independent for 9 years
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eric. I get the testing. and a good tech needs to know. but in the real world on a Toyota blow a sensor in and move on! I have worked at a chevy dealer 25 years and independent for 9 years
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Noel
Cool vid. I just worked on a case today '13 Genesis Coupe with same code. Did same test. Turned out Ecm went bad. Did not control heater properly. Thanks Eric O. for all the good tips and videos.
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Cool vid. I just worked on a case today '13 Genesis Coupe with same code. Did same test. Turned out Ecm went bad. Did not control heater properly. Thanks Eric O. for all the good tips and videos.
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Louis
Thanks for the tip Eric.
Question about the Vantage. Do you like it because it's faster? Only asking because I have a Verus Edge but I find the vantage handy if just doing electrical.
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Thanks for the tip Eric.
Question about the Vantage. Do you like it because it's faster? Only asking because I have a Verus Edge but I find the vantage handy if just doing electrical.
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The
Great video. Hey, I am retired and going to look into getting a project antique tractor to fiddle with. If you were going to replace your model H, what would you be looking for? Thanks.
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Great video. Hey, I am retired and going to look into getting a project antique tractor to fiddle with. If you were going to replace your model H, what would you be looking for? Thanks.
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Kenneth
I'm not familiar with the AFR circuit name? I know cars have oxygen sensors to regulate the fuel air ratio. Why did the test light go out when the engine was raised off idle again?
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I'm not familiar with the AFR circuit name? I know cars have oxygen sensors to regulate the fuel air ratio. Why did the test light go out when the engine was raised off idle again?
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