Check Engine Light P0137HC
Thread Starter
Pro
Joined: Oct 2010
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From: Vancouver British Columbia
Check Engine Light P0137HC
Currently getting the "Check Engine" light coming on, can pull error
code P0137HC on the Display indicating "Heated Oxygen Sensor (H02S) Circuit Low Voltage Bank1 Sensor2"
Has anyone experienced this code? I can reset the code and the light will go out but will eventually return in about 30 miles of driving. Will a slightly low battery trigger this code or do I have something more
serious to contend with.
To be more precise, I can fully charge the battery, take the car for a 30 mile ride (no light) and let it sit for about 10 days or so, the battery will discharge slightly, take it for a ride again and in about 3 miles the check engine light may return.
code P0137HC on the Display indicating "Heated Oxygen Sensor (H02S) Circuit Low Voltage Bank1 Sensor2"
Has anyone experienced this code? I can reset the code and the light will go out but will eventually return in about 30 miles of driving. Will a slightly low battery trigger this code or do I have something more
serious to contend with.
To be more precise, I can fully charge the battery, take the car for a 30 mile ride (no light) and let it sit for about 10 days or so, the battery will discharge slightly, take it for a ride again and in about 3 miles the check engine light may return.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
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From: Columbia SC
While I do not think your battery is the issue, you have not provided any specific information on what the battery voltage is after it is charged or what the battery voltage is while you driving.
Have you looked at the FSM? I was surprised at the things that factor into that code, not just a bad O2 sensor or connector/wiring.
Have you looked at the FSM? I was surprised at the things that factor into that code, not just a bad O2 sensor or connector/wiring.
Thread Starter
Pro
Joined: Oct 2010
Posts: 564
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From: Vancouver British Columbia
It's actually my son's Z., I have mine on a battery tender, I will get the battery voltage the next time this event occurs. I'm thinking it may just be a poor connection at a O2 sensor because he had his clutch replaced at a Dealership last week, but which sensor? there are 2 at the front 2 rears?
Burning Brakes
Joined: Jun 2012
Posts: 803
Likes: 42
From: Destin Florida
The light is being set off due to the car having enough drive cycles for the PCM to see the fault enough times to set of the SES light. Not the battery. That code is for the rear sensor driver side.
Thread Starter
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Joined: Oct 2010
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From: Vancouver British Columbia
Thanks for the sensor location, don't quite understand "car having enough drive cycles for the PCM to see the fault...." means.
Burning Brakes
Joined: Jun 2012
Posts: 803
Likes: 42
From: Destin Florida
In a nutshell everytime you drive most cars and a set of paramaters are meet, ie. coolant at 160 * or lower, fuel over 1/4 tank and there are several others, that is considered the start of one drive cycle. For most cars it takes 2-3 drive cycles that the computer has to see the same fault 2-3 times in a row, in your sons case low voltage from that 02 sensor. That is when the PCM will turn on the MIL ( malfuntion indicator lamp or SES light). Hope this helps.
Thread Starter
Pro
Joined: Oct 2010
Posts: 564
Likes: 12
From: Vancouver British Columbia
In a nutshell everytime you drive most cars and a set of paramaters are meet, ie. coolant at 160 * or lower, fuel over 1/4 tank and there are several others, that is considered the start of one drive cycle. For most cars it takes 2-3 drive cycles that the computer has to see the same fault 2-3 times in a row, in your sons case low voltage from that 02 sensor. That is when the PCM will turn on the MIL ( malfuntion indicator lamp or SES light). Hope this helps.
they should be able to pin point the problem now or cheaper yet, I'll replace it myself. Thanks again!
Last edited by tak06; May 28, 2014 at 06:20 PM.
