AbyssPearlTL

The car has RV6 PCDs, V3 J-pipe, and a cold air intake. The P0159 code popped up 5 minutes after I started the car after installing the CAI. It's happened two more times since then but I keep resetting the battery to see if it will return.

The breakdown on the code is:
P0159
Heated oxygen sensor, Bank 2, Sensor 2 circuit slow response.
Probable cause:
1. Air/fuel ratio concern
2. Blocked exhaust
3. Faulty o2 sensor

The strange thing now is after this code came on yesterday, I didn't reset it and it went away on it's own.

Has anyone had this issue? What is causing this?

AbyssPearlTL

anyone have any idea?

Bitter Melon

If it went away on its own. Then don't worry about it. Its when it goes away and comes back then you should start thinking about what might be wrong.

kingkong_dav

the 02's are going bad. get a decarb service to clean off those o2's

Morrissey25

iTrader: (4)

I just threw this code today as well

Morrissey25

iTrader: (4)

P0159 ACURA - O2 Sensor Circuit Slow Response Bank 2 Sensor 2

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
Possible Causes
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 2
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
Tech Notes
Replacing the O2 Sensor 2 usually takes care of the problem

When is the code detected?
The P0159 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time.

P0159 ACURA Description
The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

I wish I knew what all that meant and what I need to do at this point. One member said that the engine light and code just went away. I have to get my car inspected soon so I should probably figure this out

I just removed my rear seat in order to put my suspension in... Could it be possible that I shorted out some sort of connector?