OBD2 data questions (1 Viewer)

[kcjaz]

I am currently on a road trip in the 200 and plugged my OBD2 reader in and was just playing with looking at various “gauges” I could make in my app. I noticed a couple oddities.

1. the batter voltage reads 12.7v but the dash gauge reads 13.375v. I doubt the dash gauge is super accurate but was wondering if the dash gauge reads alternator output and maybe OBD2 is really battery voltage?

2. O2 sensor 1 reads 0.0 and sensor 2 reads around 0.8. Is something wrong with sensor 1?

 

[2014TeeLC]

I am currently on a road trip in the 200 and plugged my OBD2 reader in and was just playing with looking at various “gauges” I could make in my app. I noticed a couple oddities.

1. the batter voltage reads 12.7v but the dash gauge reads 13.375v. I doubt the dash gauge is super accurate but was wondering if the dash gauge reads alternator output and maybe OBD2 is really battery voltage?

2. O2 sensor 1 reads 0.0 and sensor 2 reads around 0.8. Is something wrong with sensor 1?

I am curious if there is an oil pressure reading with OB2 data. Since there are so many posts about low oil pressure readings from the gauge, I would be curious to know what the pressure actually is numerically. Appreciate anything you can share.

Sorry, not answering your questions. Hopefully someone on here can you help with the voltage and O2 readings. Good luck.

 

[Lester did that]

I am currently on a road trip in the 200 and plugged my OBD2 reader in and was just playing with looking at various “gauges” I could make in my app. I noticed a couple oddities.

1. the batter voltage reads 12.7v but the dash gauge reads 13.375v. I doubt the dash gauge is super accurate but was wondering if the dash gauge reads alternator output and maybe OBD2 is really battery voltage?

2. O2 sensor 1 reads 0.0 and sensor 2 reads around 0.8. Is something wrong with sensor 1?

The O2 sensors are within normal range. #1 is going to check back with the ECM more often than #2. Make sure the vehicle is warmed up and idling when you compare the numbers. If your driving the numbers are going to jump all over the place. It's how modern cars make less emissions. The engine is constantly tuning between a rich and lean environment. So if you dump on the gas pedal your going to notice peaks and troughs on the running graph. If there is no code thrown I wouldn't worry too much about those numbers.

Don't trust the voltage gauge or the oil pressure on the dash. They are more of a ball park range. If you are concerned about real time accurate numbers with this get an after market pillar gauge column. Oil pressure, trans temp, oil temp, voltage, engine temp, air in air out temps ect. All in one neat row on the drivers side. Tad overkill unless you are racing. They look groovy? Might drive you mad noticing any slight change if your OCD?

 

[LBridges]

..... get an after market pillar gauge column. Oil pressure, trans temp, oil temp, voltage, engine temp, air in air out temps ect. All in one neat row on the drivers side. Tad overkill unless you are racing. They look groovy? Might drive you mad noticing any slight change if your OCD?

Had that in a 1991 turbo MR2. Lucky to be alive, not because of the car, but my near constant focus on the gauges (I'm easily distracted by bright shiny things).

 

[kcjaz]

I am curious if there is an oil pressure reading with OB2 data. Since there are so many posts about low oil pressure readings from the gauge, I would be curious to know what the pressure actually is numerically. Appreciate anything you can share.

Sorry, not answering your questions. Hopefully someone on here can you help with the voltage and O2 readings. Good luck.

I do not see engine oil pressure in any of the PIDs or sensor choices on my OBD2. Seems odd.

 

[elcie200]

I am curious if there is an oil pressure reading with OB2 data. Since there are so many posts about low oil pressure readings from the gauge, I would be curious to know what the pressure actually is numerically. Appreciate anything you can share.

Sorry, not answering your questions. Hopefully someone on here can you help with the voltage and O2 readings. Good luck.

I'm wondering about the oil pressure, too. I recently replaced the radiator due to "the crack" and was monitoring coolant temp for s#@$s and giggles.

I used a veepeak? and the Torque app on an Android tablet. I saw the option for oil pressure, so enabled it... But it never showed a value.

 

[bloc]

Somewhere before 2013 (but not for all model years) there is a PID for oil temp, but no logging function for oil pressure to my knowledge. Which is odd, with the variable valve timing the ECU probably does have a sensor for it.

 

[Lester did that]

Somewhere before 2013 (but not for all model years) there is a PID for oil temp, but no logging function for oil pressure to my knowledge. Which is odd, with the variable valve timing the ECU probably does have a sensor for it.

A live reading of the of the oil pressure is a tad over kill unless you are racing and really pushing the motor. But then you are watching for high pressure. LC's always look low if you look at it like a gas gauge.

Unless you damage something like rip off the oil pan or some how manage to break off the oil filter somehow don't worry about it. Or forget to put the drain plug back in. oil pressure is the least of your worries.

If your towing a lot especially up and down grades then you probably want to keep an eye on your transmission temp. Thats all you need for live monitoring.

 

[bloc]

A live reading of the of the oil pressure is a tad over kill unless you are racing and really pushing the motor. But then you are watching for high pressure. LC's always look low if you look at it like a gas gauge.

Unless you damage something like rip off the oil pan or some how manage to break off the oil filter somehow don't worry about it. Or forget to put the drain plug back in. oil pressure is the least of your worries.

If your towing a lot especially up and down grades then you probably want to keep an eye on your transmission temp. Thats all you need for live monitoring.

I’m not that worried about it.. just seems odd that the computer should have the ability to measure it, but apparently not display it. Though it would be nice to see just what the pressure is while the gauge indicates such a low reading.

Do we have a low oil pressure light in the event of a cracked pan or left out plug? I don’t remember one.. but that seems like a basic requirement.

 

[2014TeeLC]

I’m not that worried about it.. just seems odd that the computer should have the ability to measure it, but apparently not display it. Though it would be nice to see just what the pressure is while the gauge indicates such a low reading.

Do we have a low oil pressure light in the event of a cracked pan or left out plug? I don’t remember one.. but that seems like a basic requirement.

Agree with you bloc. I'm not worried about it either. More curious as to what the actual oil pressure is during various operating conditions. Having that data point would be especially useful as the miles rack up to know the overall health of the engine.

 

[Lester did that]

I’m not that worried about it.. just seems odd that the computer should have the ability to measure it, but apparently not display it. Though it would be nice to see just what the pressure is while the gauge indicates such a low reading.

Do we have a low oil pressure light in the event of a cracked pan or left out plug? I don’t remember one.. but that seems like a basic requirement.

Yes there is an oil pressure idiot light on the dash if the oil pressure does get too low. At that point you stop driving and investigate. Same with a flashing check engine light.

LC 200's are notorious for throwing new owners off because the dash gauge only reads in the 25% range plus minus. It looks low but its fine. Oil pressure is not something to get neurotic about with these motors. Never heard of a pump blown, only a quick lube forgetting to put a plug back or not putting enough oil back in. There are so many threads on here about this.

Don't worry about the oil pressure. It will be fine.

And if you are neurotic pressure check each cylinder 2 twice a year and keep a running record to monitor engine wear and also have all fluids tested at the same time. That was sarcasm.

 

[linuxgod]

I am curious if there is an oil pressure reading with OB2 data. Since there are so many posts about low oil pressure readings from the gauge, I would be curious to know what the pressure actually is numerically. Appreciate anything you can share.

Sorry, not answering your questions. Hopefully someone on here can you help with the voltage and O2 readings. Good luck.

nope. oil temp is available though

 

[2014TeeLC]

Yes there is an oil pressure idiot light on the dash if the oil pressure does get too low. At that point you stop driving and investigate. Same with a flashing check engine light.

LC 200's are notorious for throwing new owners off because the dash gauge only reads in the 25% range plus minus. It looks low but its fine. Oil pressure is not something to get neurotic about with these motors. Never heard of a pump blown, only a quick lube forgetting to put a plug back or not putting enough oil back in. There are so many threads on here about this.

Don't worry about the oil pressure. It will be fine.

And if you are neurotic pressure check each cylinder 2 twice a year and keep a running record to monitor engine wear and also have all fluids tested at the same time. That was sarcasm.

Knowing oil pressure is a car guy thing. Some are okay with it being fine and others are simply curious as to what it actually is. I don't think anyone on this thread said they are worried or neurotic about it.

 

[Zjohnsonua]

Oil pressure won't be on the CANbus, so there is no PID for it. The engine's engineering was done off threshold levels. The gauges have a designed-in "dead spot" that doesn't show every little oscillation.

O2 sensors oscillate between 0 and ~1VDC as part of the fuel management system. If the oscillations stop, you have a problem, and likely have a code to investigate. One bank doesn't read any faster than the other, they should oscillate at nearly the same frequency. Do not expect to see them act together in any meaningful way. You should see less fluctuation in Sensor 2 in a given bank, however, as Sensor 2 is downstream of the cats which should be cleaning everything up.