It means your car is running too lean... from the FSM:Charleee7 said:What would a person look for if the code reader said 0171 and 0174, lean bank 1, and lean bank 2. What does this code mean, and what would I do to fix the problem. Can someone help me.
Possible causes are:Fuel injection system does not operate Properly,
the amount of mixture ratio compensation is too
large. (The mixture ratio is too lean.)
I had the same problem first one 0174 then the other, never both at same time. I replaced both "before" converter O2 sensors, ended up taking it to dealership. They replaced the Mass Air Flow Sensor. Works fine now.Charleee7 said:What would a person look for if the code reader said 0171 and 0174, lean bank 1, and lean bank 2. What does this code mean, and what would I do to fix the problem. Can someone help me.
Puppetmaster said:Clogged injectors? Not too sure... but I can do some research....
If your car can go rev over 2500 rpms, its not the MAF, that's for sure. Since you say it works fine after its warmed up, then it could be the injectors....
you thinking this checkup can help him, i thing he should be read OXsensor bank one and also find what all tell him
So a 2000 spec MAF is still going to require the ECU to be reprogrammed? Is his car not a 2000?titan_213 said:bank one is the right(back) head, the guy earlier in the thread was right you will probably need a mass airflow meter, and if it a 2000, you will need the ecu reprogramed cause the new meter is a countermeasure meter.
I have an 01 Max and recently changed my 02 sensor. Had the same problem of the engine light coming back on. As it turns out, the ECU has to be reprogrammed to accept the parameters of the new sensor. Car runs much better after the reprogram and took care of all other SES codes.Skippermax said:I took it to my garage, they changed out an O2 sensor but the engine light came back within 2 hours of driving. They put my original O2 sensor back in. They then cleaned the probe of the mass flow sensor and again the engine light came on within a few hours.