I'm a new guy here and just had my nitrous system installed and I had my CEL light come on about an hour after my first test run which was a quick shot of N20. I ignored it for a day, until the next day I got my Dashahwk in, so I plugged it in and I get the message that I'm running lean on Bank 1 and Bank 2. Now my rear O2's are deleted and I just had the nitrous installed and tuned the day prior, when the tune was done I kept it very rich and while on my street run my tuner datalogged via HPT and everything looked good etc. So you think I should clear the code and see if it re-appears then take it from there? I just don't like the whole lean idea but if it is because of the quick on off like I did on my test run then Im cool with it. Any help would be extremely appreciated?

Here is what I got from the Dashawk:

P0171: System to Lean (Bank 1).

--Description-- The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit.

--Possible Causes--
Air Measurement System
- MAF sensor (contaminated, damaged, malfunctioning, etc.)

Fuel System
- Fuel pressure regulator (leaking, malfunctioning, etc.).
- Fuel filter plugged, dirty.
- Fuel pump (weak, check valve leaking, etc.).
- Leaking/contaminated fuel injectors.
- Low fuel pressure or running out of fuel.
- EVAP canister purge valve leaking (when canister is clean).
- Fuel supply line restricted.
- Fuel rail pressure sensor (incorrect reading).

Air Induction System
- Air leaks after the MAF.
- Vacuum Leaks.
- PCV system (leak, valve stuck open, etc.)
- Improperly seated engine oil dipstick.

Exhaust System
- Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.).

EGR System
- EGR valve tube/gasket leak
- EVR solenoid vacuum leak

Secondary Air Injection
- Damaged/malfunctioning secondary air injection system (mechanically stuck valve).

P0174: System to Lean (Bank 2).

--Description-- The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit.

--Possible Causes--
Air Measurement System
- MAF sensor (contaminated, damaged, malfunctioning, etc.)

Fuel System
- Fuel pressure regulator (leaking, malfunctioning, etc.).
- Fuel filter plugged, dirty.
- Fuel pump (weak, check valve leaking, etc.).
- Leaking/contaminated fuel injectors.
- Low fuel pressure or running out of fuel.
- EVAP canister purge valve leaking (when canister is clean).
- Fuel supply line restricted.
- Fuel rail pressure sensor (incorrect reading).

Air Induction System
- Air leaks after the MAF.
- Vacuum Leaks.
- PCV system (leak, valve stuck open, etc.)
- Improperly seated engine oil dipstick.

Exhaust System
- Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.)..

EGR System
- EGR valve tube/gasket leak
- EVR solenoid vacuum leak

Secondary Air Injection
- Damaged/malfunctioning secondary air injection system (mechanically stuck valve).

 

I cleared mine one time (I think it was the same code), and it did not come back, it came on within a hundred miles after I had sprayed for the first time.

 

So you think I should just clear it and see if it comes back?

 

If it comes back then troubleshoot some more.

 

i would rather see system rich but clear it and check narrowband reading if you don't have a wideband.