Hey everyone,
Just wanted to share my 'Lean Condition' P1273 drama.
So, I have 2004 Sentra 1.8S, CA edition (107K). No mods, all stock.
I just installed the 'Fuel Pump Repair kit' from courtesynissan to fix the 'Hard Start' issue. This problem has been solved since install of the repair kit. Soon after install, I got the P0128 - Engine Coolant Temperature defective. So I changed the sensor and reset the code, then problem solved.
After awhile, I got the P1273 code. This is for 'Lean Condition detected. Sensor 1, bank 1'.
Possible problem from FSM:
A/F Ratio (O2) sensor in Manifold,
Fuel injector/regulator
Leak in intake/exhaust.
My car did not have any leak and did not have any fuel issue. I found out that for my car, fuel pressure regulator is built-in to the pump assembly. This was replaced with the 'Fuel Pump Repair kit.' After many weeks with google and forum. No one really had a solid solution.
FSM has a section 'Clear the Self Learning Data' procedure. Apparently, anytime fuel component is replace, this procedure needs to be done.
Basically,
1. Unplug MAF sensor
2. Start car for about 3 seconds. Turn off car. confirm P0102 code
3. re-connect MAF sensor. Clear code. START car.
4. Run car for 10 mins.
... no more P1273. (This should work for P1274 - Rich condition)
Hope this helps someone!
-Jae
Just wanted to share my 'Lean Condition' P1273 drama.
So, I have 2004 Sentra 1.8S, CA edition (107K). No mods, all stock.
I just installed the 'Fuel Pump Repair kit' from courtesynissan to fix the 'Hard Start' issue. This problem has been solved since install of the repair kit. Soon after install, I got the P0128 - Engine Coolant Temperature defective. So I changed the sensor and reset the code, then problem solved.
After awhile, I got the P1273 code. This is for 'Lean Condition detected. Sensor 1, bank 1'.
Possible problem from FSM:
A/F Ratio (O2) sensor in Manifold,
Fuel injector/regulator
Leak in intake/exhaust.
My car did not have any leak and did not have any fuel issue. I found out that for my car, fuel pressure regulator is built-in to the pump assembly. This was replaced with the 'Fuel Pump Repair kit.' After many weeks with google and forum. No one really had a solid solution.
FSM has a section 'Clear the Self Learning Data' procedure. Apparently, anytime fuel component is replace, this procedure needs to be done.
Basically,
1. Unplug MAF sensor
2. Start car for about 3 seconds. Turn off car. confirm P0102 code
3. re-connect MAF sensor. Clear code. START car.
4. Run car for 10 mins.
... no more P1273. (This should work for P1274 - Rich condition)
Hope this helps someone!
-Jae