Code 1 for other than O2 Sensor

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ms2000
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Code 1 for other than O2 Sensor

Postby ms2000 » March 11th, 2017, 3:02 am

Anyone with experience or knowledge of Code 1 being thrown when O2 Sensor is working fine?
What seems the issue?
Has temp or rain anything to do with it?

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evtsteward
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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 11th, 2017, 4:03 pm

Code one is a weak O2 sensor or disconnected or broken wire leading to the sensor. If you haven't done so, pull the 10 amp fuse on the battery positive terminal for 1 minute to clear the codes stored in the ECU. See if it shows up again. You can also check continuity between the connector plug and further upstream to determine if continuity exists and eliminate the defective area.
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ms2000
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 11th, 2017, 10:04 pm

Thanks @evtsteward

Does the Gen1 have a Mass Airflow Sensor(MAF) sensor? It appears that too many things can make it to run rich.

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 12th, 2017, 4:03 pm

No. It does have an air temp sensor on the drivers side of the intake. If the car is accelerating okay then I wouldn't consider the TPS on the throttle body. All other tune up parts are in good shape? Might want to check the igniter. Other than resetting the valve lash, because these vehicles need a precise vacuum, I'd maybe change the O2 again with a Bosch brand. Other off brands don't seem to function well in our cars.
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 12th, 2017, 4:51 pm

@evtsteward

1) "Other than resetting the valve lash" - are you referring to valve adjustment? Am I correct that valve adjustment issue could be heard on engine sound (when it is running)?

2) Can the MAF sensor cause this?

3) "Might want to check the igniter" - you mean timing? Tune up is in good shape. Timing belt/tune up was done 12k/ 3yrs ago.

4) I changed the Air filter yesterday and need to take it for a long test drive - immediate observation was it was idling just over 1k rpm (the car tend to car low idle) a change after the changing the air filter.

The car is accelerating fine and I cleaned that butterfly area - it tends to stay clean though
O2 sensor is OEM and 9months/3k miles old - with the Code 1, mechanic re-checked and told me that it is working fine.

I don't know if the heavy rain caused an issue - including the air filter, which is changed now. It would easily give code 1 in cold mornings than later in the day (eg you take it to work and check engine light comes on - car is parked in the Sun - 2-3pm, you drive home it does not do, lately - it typically takes 15mins to give code 1 but had taken as low as 9mins and high as 17mins, including none when you drive home).

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 12th, 2017, 10:02 pm

If your car is an electronic distributor then check the internal igniter.
Valve lash is the cam lash adjust. It needs to be within spec. No, it's not an audible thing.
We don't have an MAF, only the air temp sensor and the MAP(main atmospheric pressure) sensor on the end of the firewall set of valves with all the connectors and vacuum lines attached from the black box.
Again, the O2 sensor can check out fine but after a few moments can throw a PGM-FI light for a moment. Most of this is caused by fuel injector additive and higher octane fuel knocking carbon off the valves and lodging on the O2 grating. If you don't store a code then you have a crappy O2 sensor. I've said this before. Or perhaps a clogged up catalytic converter.
Have you stored any codes and if so have you cleared them to see if they reoccur?
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 12th, 2017, 10:52 pm

Gives code 1 and reset twice and it came back on
It is electronic FI - no carb

Has a new CAT


thebranded
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Re: Code 1 for other than O2 Sensor

Postby thebranded » March 13th, 2017, 3:30 am

I see you are asking about your injectors too. I had a CEL code 1 for my o2 sensor and had leaking injectors at the same time. After fixing the injectors the o2 error went away (so far, only been a few weeks), figure my injectors were leaking so bad the gas was not burning right and triggered an o2 error.
Rover 416i aka Honda aka Acura

Suspension: Illumi's all round, 24mm torsions (waiting to be installed) Cusco front strut bar
Intake: K&N Drop in filter
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 13th, 2017, 5:09 am

Thanks @thebranded for connecting the leak to Code 1.

I did go to the shop and they tested O2 sensor and said that it is running rich (might have also said lean - unsure if both can happen together)

Since the repair it is still happening but it might be fewer times than before. Wonder if the car is self adjusting to return to normal!

I will hold the repair for a month then and see if it returns normal.

Also did you replace the FI or just the seal?


thebranded
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Re: Code 1 for other than O2 Sensor

Postby thebranded » March 14th, 2017, 12:55 am

after repairs, reset the ecu (remove the red fuse on the battery terminal) and see how it goes. Saved me a bit of money and time from not replacing the o2 (easy to replace, but hard to get to)

I was still running original injectors and was well over due for a replacement so did them and the seals. Also new sparks and leads.
Rover 416i aka Honda aka Acura

Suspension: Illumi's all round, 24mm torsions (waiting to be installed) Cusco front strut bar
Intake: K&N Drop in filter
Exhurst: 2" SS 75% parts aquired.


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ms2000
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 14th, 2017, 4:56 am

Thanks @thebranded

But this is not so luck - still giving "code-1" 9mins into the driving in early morning.
It still has the old FI - 170k miles on it.

I am being pointed to valve adjustment as well.

How much did it cost to buy the FI - where did you buy it from?

How many miles on your car?

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 14th, 2017, 2:34 pm

If you want the FI o-ring kits I'd go with rock auto. Same with complete injectors.
My car is now at 512000.
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The great ships hung in the air in much
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ms2000
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 14th, 2017, 2:41 pm

@evtsteward - you rock - hope you recall that I gave an invite to San Jose!


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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 14th, 2017, 3:17 pm

How often in miles vs years would you do valve adjustment on this car?

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 14th, 2017, 10:09 pm

I adjust my valves every 40-50K. Or every two - three years.
Robert, that crazy guy with all the tegs!
Always an honor to be quoted.-B18Ch1ck
The great ships hung in the air in much
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 15th, 2017, 3:29 am

Current State:
It only throws code 1, in cold start - know for sure that it does around 6am pacific time (local time)

Before fixing the FI gas leak - it was rainy - it did it in cold start around noon. I am going to see if it does again during the weekend - just to see environmental temp has an effect.

Otherwise, any experience on throwing code 1, in cold start?


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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 18th, 2017, 10:12 pm

My Test Report:
1) Had ECU reset lastnight
Took the car for test ride around 1pm w/ outside temp around 64F
2) 10mins into the drive the CEL came on - solid red (always)
3) Turned off the engine and turned it on to make the dash light to go away - drove about the same distance and CEL did not come back.
4) Reset the ECU and drove about 30mins - CEL never came back on.

Another test report at 6am:
1) Had ECU reset previous night
2) 10mins into the drive the CEL came on at about 6am
3) Turned off the engine and turned on and drove (ECU wsa not reset)
4) CEL came back on
5) Turned off the engine and turned on and drove (ECU wsa not reset)
5) CEL came back on (total of 3 times it came back on) - reached the destination (did not reset the ECU) - drove again at 2pm - CEL never came back

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 20th, 2017, 3:43 pm

Know anyone else with the same car? Or spare ECU? I'd try changing that out and seeing it this gremlin reappears.
Robert, that crazy guy with all the tegs!
Always an honor to be quoted.-B18Ch1ck
The great ships hung in the air in much
the same way bricks don't.-Douglas Adams

The value of life can be measured by how many
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ms2000
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 27th, 2017, 8:15 pm

The problem has stopped - I used the Red Line Complete SI-1 Fuel System Cleaner below - CEL stopped for a day and then it came back and remained for about 70 miles - now it had stopped for a week - hoping it will last:
https://www.amazon.com/Red-Line-Complet ... B000CPI5Z0

Unsure if the heavy rain has anything to do with too!

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 27th, 2017, 9:26 pm

Yee! Haw! Carbon buildup is what it was. Flakes lodging on the O2 grate.
Robert, that crazy guy with all the tegs!
Always an honor to be quoted.-B18Ch1ck
The great ships hung in the air in much
the same way bricks don't.-Douglas Adams

The value of life can be measured by how many
times your soul has been deeply stirred.-Soichiro Honda


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ms2000
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 27th, 2017, 9:51 pm

@evtsteward

Where were the carbon buildup? What is O2 grate?

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 27th, 2017, 10:03 pm

Carbon flakes off the valves and combustion chamber lodge on the O2 sensor because of holes on the O2 sensor that allow blow by of exhaust gases. Any bit of carbon flake will cause the O2 sensor to register a code till it burns off and flies away out the exhaust. That's why I see intermittent codes that disappear once a month.
Robert, that crazy guy with all the tegs!
Always an honor to be quoted.-B18Ch1ck
The great ships hung in the air in much
the same way bricks don't.-Douglas Adams

The value of life can be measured by how many
times your soul has been deeply stirred.-Soichiro Honda

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evtsteward
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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 27th, 2017, 10:04 pm

Denso is the preferred O2 sensor for our cars.
Robert, that crazy guy with all the tegs!
Always an honor to be quoted.-B18Ch1ck
The great ships hung in the air in much
the same way bricks don't.-Douglas Adams

The value of life can be measured by how many
times your soul has been deeply stirred.-Soichiro Honda


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ms2000
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Re: Code 1 for other than O2 Sensor

Postby ms2000 » March 27th, 2017, 10:08 pm

It has a new O2 sensor installed in May Last yr. It prob done 3k miles since then! They installed OE brand - could be NGK
The CAT was also changed at the same time.
Do u still think it needs to be changed?

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Re: Code 1 for other than O2 Sensor

Postby evtsteward » March 28th, 2017, 12:48 am

Not if the code doesn't reoccur. Should be fine.
Robert, that crazy guy with all the tegs!
Always an honor to be quoted.-B18Ch1ck
The great ships hung in the air in much
the same way bricks don't.-Douglas Adams

The value of life can be measured by how many
times your soul has been deeply stirred.-Soichiro Honda


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