Question about 2002 Honda S2000

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Indicator light came on and the car is not humming like it used to. I noticed that the oxygen sensor glows bright red and the passenger side floor boards are hot after driving for less than 10 minutes. What is the most likely cause?

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You have some type of exhaust/catalytic converter issue.

Take it to a mechanic and have them pull the code immediately. that will tell you the issue.

if you have a failure in the 02 sensor then I am willing ot bet that the car is running super rich and the exhaust is still rich enough that it is continuing to combust down through the exhaust which runs under the passenger seat.

Posted on Jul 27, 2011


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Why is my crown vic slow and hot?

I would say your exhaust converter is worn out & blocking
the exhaust from getting out & since you continued to wonder ,
verses actually having the car tested,that you now have ruined the transmission

Jul 24, 2014 | 1996 Ford Crown Victoria

1 Answer

Just had bank 1 and bank 2 of the catalyist system a total of 4 catalitic converters on a 97 ford explorer put back in but still runs rough .checked on the plugs and wires and nothing there . went to look...

I can probably tell you EXACTLY what the problem is - the catalytic converters did not cause your "running bad" problem. The running bad problem burned up your catalytic converters.
Now I KNOW your check engine light has GOT to be SCREAMING at you! If you scan your onboard computer system, I think you will most likely find codes P0171 and P0174 (Oxygen sensor lean Bank 1 and bank 2 respectively) Your catalyst is glowing red hot because there is WAY too much fuel and oxygen in the exhaust!!!

The oxygen is in there because you have a severe vacuum leak. Assuming that you have either a 4.6L or 5.4L engine (It would be helpful to mention these things when you ask for help with your truck) the MOST LIKELY cause is a hole in the rubber boot that connects the PCV tube to the back of the throttle body/plenum area. THIS would be the INITIAL CAUSE of the problem and had it been fixed when the check engine light first came on, you could have saved the cost of the catalytic converters.

The extra fuel is getting in there because the computer is dumping fuel into the engine because the oxygen sensors are telling it that there is too much oxygen in the exhaust and the engine is running lean. The oxygen sensors are only reporting what they see, so it is NOT their fault! There IS too much oxygen in the exhaust!

So, with all that said, fix the vacuum leak, clear the codes, and your truck should be back to normal.

Oct 14, 2011 | 1997 Ford Explorer AWD

1 Answer

Is there an ALDL port on a legend plug in a scan tool

There is a connector but it is not like the connector used in the newer 1996 OBD2 cars, your year uses OBD1, here is how you check for codes in this car.

Acura OBD1 Codes Retrieval
Acura vehicles 1986-95 obd1 code retrieval
There are a few different ways to retrieve the codes for "check engine light" for Acura vehicles. One method is to use a led light (sometimes 2 led lights) on the computer or controller box itself. If it has 2 led lights, the color is red and amber. The red is used for flashing the codes whereas the amber is used for adjustment. If you have only a single led light indicator, then that is used for flashing the code.
The controller box can be found by lifting the carpet of the passenger side front foot well or floorboard. You can see the led lights without removing the controller. On other models, you can find the controller under the driver or passenger front seat.
The second way to get the code is using a jumper wire on the diagnostic connector located on the kick panel at the front passenger side. You then watch the codes being flashed at the dash panel after you turn the key on. To read the code being flashed is easy. Example: Code 23 is 2 long flashes followed by 3 short flashes. A longer pause separates the next code that follows.
Here are Acura vehicles 1986-95 general codes:
Code 0 Electronic control unit (ecu)
Code 1 02 (oxygen) sensor
Code 3 and 5 map sensor
Code 4 Crank angle sensor
Code 6 Coolant temperature sensor
Code 7 Throttle angle sensor
Code 8 Crank angle sensor (TDC)
Code 9 Crank angle sensor (CLY)
Code 10 Intake air temperature sensor
Code 12 EGR system fault
Code 13 Atmospheric pressure sensor
Code 14 Electronic air control valve
Code 15 Ignition output signal
Code 16 Fuel injector fault
Code 17 Vehicle speed sensor
Code 21 Spool solenoid valve
Code 22 Valve timing oil pressure switch fault
Code 23 Knock sensor
Code 41 Oxygen sensor heater fault
Code 43 Fuel supply system

Nov 30, 2010 | 1990 Acura Legend

1 Answer

Check engine light came on, diagnostic revealed oxygen sensor, replaced all oxygen sensors, drove the car for 50 kms, stopped and restarted the car and after a few minutes, the light came on again. What ...

the beginning of yourproblem is misdiagnosis, you probably had it code scanned,and got an 02 code, if you had it on a real time scanner you would get readings from the scanner to assist in diagnosis, story i tell my assistants, the floor is wet, first guy mops it up and leaves, second guy noticed water dripping on the floor, so he mops it and places a bucket to catch the drips. third gut sees the wet floor, notices the drip , looks up an notices the roof is leaking, so he fixes the leak and mops the floor, same idea with cars, you get the symptom but you have to find the cause to repair right, so find a tech with a real time scanner and take the time to do it right

Nov 20, 2010 | Ford Windstar Cars & Trucks

1 Answer

1999 dodge turbo diesel m/t i noticed the turbo started spooling up quick when i was pulling my 24ft enclosed now it want spool up or i dont feel it at the top of the pedal like before mileage has fallen...

You could have a blocked catalytic converter. When engine is at operating temp, if the pipes glow red in the vicinity of the converter (enough to get the floor hot), it's critical to replace the catalytic converter to restore power and prevent engine damage.

Sep 28, 2010 | 1999 Dodge Ram

1 Answer

01 Saturn L100 coolant leak

most likely it is a heater core failure. it is located behind the glove box

Jan 09, 2010 | Saturn L-Series Cars & Trucks

2 Answers

P0138 02 circunit high voltage sensor 2 red light

The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); on Facebookcopyscape.gif Symptoms There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.
Causes A code P0138 may mean that one or more of the following has happened:
  • Faulty O2 sensor
  • Short to battery voltage in O2 sensor signal circuit
  • High fuel pressure (not as likely)
Possible Solutions Here are some potential solutions:
  • Replace O2 sensor
  • Repair short to battery voltage in o2 sensor signal circuit

Dec 20, 2009 | 1993 Jeep Grand Cherokee

1 Answer

P0159 is what the read out tells me. Just what do I need to do about this? I turned off the 'Check Engine Light' and it's still off after 2 days. But......!!!

What does that mean? This involves the rear oxygen sensor on the passenger side. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Symptoms You will likely not notice any drivability problems, although there may be symptoms.
Causes A code P0159 may mean that one or more of the following has happened:
  • The oxygen sensor is faulty
  • The wiring to the sensor is broken / frayed
  • There is an exhaust leak
Possible Solutions The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the rear passenger side oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
  • Check and fix any exhaust leaks
  • Check for wiring problems (shorted, frayed wires)
  • Check the frequency and amplitude of the oxygen sensor (advanced)
  • Check for a deteriorating / contaminated oxygen sensor, replace if necessary
  • Check for inlet air leaks
  • Check the MAF sensor for proper operation
Related P0159 Forum Topics

Oct 07, 2009 | 2001 Nissan Maxima

2 Answers

I replaced the oxygen sensor on my 03 Audi A4 3.0L. I noticed the sensor was glowing red and the car was missing which prompted me to replace it. It did not fix the problem at all. I still have a check...

sounds like you have a catalytic converter issue.unplug sensor drive down the road and back check it again.If it glowing you have a catalytic converter issue.if not and only when it is plugged in,you will have trace wires to find the cause on the circuit.

Aug 08, 2009 | 2003 Audi A4 Cabriolet

1 Answer

2003 yukon xl 5.3l flexfuel all plugs lean on passenger side

P0131 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage

P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1

Bank 1 Sensor 1
P0300 - Engine Misfire Detected

I would check for vacuum leaks, maybe intake or brake booster

Dec 16, 2008 | 2003 GMC Yukon XL

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