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P0174 OBD-II Trouble Code: System Too Lean (Bank 2)
P0174 code definition System Too Lean (Bank 2) What the P0174 code means Code P0174 indicates that there is a lean condition detected by the Engine Control Module (ECM). A lean...

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Codes showing: P0171, P0420, P0174
Hello. These diagnostic trouble codes are an indication that there could be a problem with the oxygen sensor or that there is a vacuum leak. It is possible that the vacuum leak is located in the intake manifold. These codes...
RPMs erratic during idling, Check Engine Light on, P0174 code
Hello. The P0174 code deals with the truck running lean. That means that the PCM is restricting fuel to the injectors. This is usually caused by a vacuum leak in the engine. There could be a leaking intake gasket, or...
Codes P0171 and P0174
Codes P0171 and P0174 pertain to the engine running lean on both bank one, and bank two, meaning that both sides, or the complete engine, is running lean. The lean condition could be one of several possible causes. The intake...
What sensor affects bank 2?
Code PO302 refers to a misfire. P1153 refers to the O2 sensor not switching often enough. This sensor monitors how often a lean to rich condition or rich to lean condition is present. When there is inconsistency in this, the...
Still getting error codes
The codes you have for your GMC Yukon, p0171 and p0174, are informing you that the engine is running lean. This means that there is unmetered air entering the engine after the mass airflow sensor and is disturbing the air/fuel...
transmission (ax4n) is not going into overdrive
You will need to have the transmission tested to see if the transmission solenoid for the torque converter lock up solenoid is stuck or bad. The transmission fluid should also be checked to see if it is full of clutch...
My 2000 ford expedition is showing 0171 and 0174 codes do you have a estimate to fix?
The codes P0171 and P0174 point to a lean condition picked up by the oxygen sensors in the vehicle's exhaust system. Since there is a warning from both banks, it may be safe to say that this is could be...
Engine is running rough and P0401, P0171 and P0174 codes.
The first thing to check is to see if the EGR solenoid will release the vacuum when the electrical connector is disconnected. If it still doesn't release the vacuum then the solenoid should be replaced. The codes need to be...
My truck is losing power on take off and throwing multiple codes
Hello. The codes listed are indicative of lean conditions on both banks A and B, as well as issues with the camshaft position sensor for circuit B. A lean condition at both banks can be caused by many things. A...
Unable to go past 70-80 Km when going up a hill. Code P0174 with flashing engine light
Hello. A flashing Check Engine Light is an indicator that the computer has detected an issue that may potentially cause harm to the vehicle's emission system components. The code P0174 indicates a lean condition on bank 2 of the engine....
loss of power when driving check engine light blinking at 30 mph just changed manifold intake have p0171 p0174codes
You are having problems with the fuel injection system poppet injectors not opening up or stuck open causing the misfire. You may have a bad fuel pressure regulator or you did not seal the fuel lines into the regulator good...

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