P1174 getting code 1174. How do you fix it

You may have a fuel injector problem.- try a good fuel system cleaner.

sorry we do not have medication answers here of this site .

There is a technical service bulletin that states the correct procedure to repair this issue is to replace the injectors with updated units AND reprogram the pcm for the new injectors.

1174 L X 61.0237 CU IN =7164.CU INS +.182

which engine?
we cant guess that.
so read the FSM and it will ask that too.
https://suzukipitstopplus.com/Products/1174-2001-grand-vitara-xl-7-service-manual.aspx

if you have the 2.5L V6 you wont like the answer !

see page 22 here. 2.5L
with person about to remove it. see the comments in blue?
http://www.fixkick.com/engine/2.5L%202004%20Tracker/25L-2004-engine.pdf

The 455 and 1174 are probably related to the same issue---emissions and air to fuel mixture which could be a purge valve for the evap. system and the 521 is usually a bad oil pressure sensor.

You may need a shop manual to get the testing procedures.
Code 303 is for a miss on cylinder 3 which could be ignition or fuel related.
Code 1174 is for a problem with the fuel trim which could be due to the problem with cylinder 3 or something else.

Year make and model ?
Code 170 is for a lean or rich fuel mixture on bank one.
Code 301 is for a miss on cylinder one which could be fuel, ignition, or something mechanical.
Code 1174 depends on the vehicle.

1174 is a lean code, and would have to been set first because it will not set when the 0300 is there. 0300 is a random misfire, because it read after the lean code, it was probably caused by the lean condition. 1st check for vacuum leaks from hoses or intake gaskets, you cal listen for a hissing sound, or spray carb cleaner around intake systems, a change in rpm will be noticed when spraying near a vac leak. other probable causes are the upstream 02 sensor, map sensor, or fuel delivery problems. does the vehicle idle porly, or does it miss at the top end?

I had the exact same problem on my 1998 Audi A4 Quattro Sedan I just purchased. I read a couple of other posts that said to try looking for the radio code in the spare tire compartment in the trunk. Sure enough on the right hand side of the compartment was a information label and on it someone had written the code 1174 in pen. I then left the key in the ignition and the radio on for an hour. Then I pushed the DX and FM1/2 button and the same time until the "1000" number appeared on the display. Then I pushed in the code 1174 using the 1 - 4 tuner buttons. For example the number 1 key I pushed until the number 1 appeared. Then pushed button number 2 until the number 1 appeared, pushed button 3 until the number 7 appeared and button 4 until number 4 appeared. After I had the code 1174 on the display, you again push the DX and FM1/2 button at the same time and the radio unlocked and worked perfectly. I hope that this helps. I have the Delta (Bose) AM/FM Cassette radio in my car. Good Luck!!