Code P0171 and P0174

P0171 : System too lean bank 1

P0174: System too lean bank 2

These codes let you know the O2 sensors are creating a lean condition. Since it is apparent on both sides of the engine we can rule out a blown head gasket or injector issue. We can even rule out a misfire. The majority of the time this is caused by a vacuum leak. There are several hoses that can become weak and collapse. Pay close attention to all the vacuum hoses. These codes may be accompanied by a rough idle. Replace the hoses as needed. On some vehicles you may even find the intake gasket leaking(plastic intakes).

VCM engaging and disengaging – Honda

Question:

I have a 2008 Honda Accord 3.5 V6 w AT. I feel the VCM engaging and disengaging. There is a sickening surging sensation – a hybrid like torque feel that is incessant, particularly at highway speeds with cruise control on. What gives? Honda denies any problem – “operating within normal tolerances” Is there a widespread problem with VCM? 
 

Answer:

I’ve recently had a few 08’s with this problem. If the dealer uses the HDS scan tool and goes into the power-train side of the computer they can scan for updates and install the latest software patch and that should fix the problem. Also I would reset and follow the crank sensor calibration procedure to ensure the problem goes away. It’s worked so far for me to do those two things to fix it. 

O2 sensor heater circuit malfunction (bank 1 sensor 1)

Question:

I have a 1998 Toyota Camry V-6 (1MZ-FE) engine, with automatic transmission, not a California car, that has a check engine light. I took it to the local Advance Auto store and their tester indicated that the O2 sensor heater circuit malfunction (bank 1 sensor 1) had failed. The sensor was replaced and the system was reset by removing the negative battery cable for 5 minutes and then reconnected. After driving a few miles the check engine light came on again. There seems to be a difference of opinion if there are one or two O2 sensors prior to the catalytic converter. What is your suggestion?? 
 

Answer:

There are (2) O2 sensors prior to the catalytic converter. Each sensor is located in the exhaust manifold assembly. One in the front (radiator side) and one in the rear (firewall side). Bank 1 Sensor 1 is the back sensor (firewall side).

code P 0750 Shift solenoid A malfunction.

Question:

I have a 02 Ford Focus and the transmission has trouble shifting gears (not engaging all the time) I brought the fluid level up and now the check engine light is on and the problem has gotten worse. I get an OBD-2 code P 0750 Shift solenoid A malfunction. Am I looking at a major repair here?

Answer:

If you consider $500.00 a major repair , then YES. You should be able to have the solenoids replaced inside of one day at your local transmission shop for around $500.00. These are common failure parts.
 

code p1457 on 2002 Honda Civic

Question:

I have a 2002 with code p1457, what is the easiest way to fix the problem?

Answer:

The most common cause of that code is a loose gas cap. Try tightening the gas cap and waiting a few days for it to clear. If you don’t want to wait for it to clear you can disconnect the batteries negative battery cable for a few minutes then reconnect it and it will reset it. Make sure though that you have the radio’s security code before you disconnect the battery cable if the radio is original or the radio won’t work again.
 

Honda Codes 11-A0 and 92-20

Question:

I have a 2003 Odyssey with the SRS light that has come on twice now and stayed on. The first time the dealer just reset it after a diagnostic fee and said to come back if it happened again. It came back on a few days later. This time they checked it and are saying I need to spend almost a thousand dollars to replace the drivers air bag (and that it isn”t covered by Honda or my Honda Care warranty). They say the codes are 11-A0 and 92-20. What do you think is going on?

Answer:

When the problem occurs, you might want to see if the horn, cruise, and radio controls on the steering wheel are working or if they are inoperative. I’ll explain:

The SRS diagnostic trouble code (DTC) 11-A0 indicates a problem in the driver’s airbag, but it does not necessarily mean it is the airbag itself. In my experience, it has been the cable reel that is at fault (the cable reel just carries electricity from the steering wheel controls so you can turn the steering wheel and still have power). With the proper tools, this is easily diagnosed by substituting the airbag with an inflator simulator (it takes the place of the airbag and gives the system the proper amount of resistance). DTC 92-20 is shown as a short in the passenger’s airbag cut-off indicator and the test procedure is very much the same as for 11-A0. I would have to say that they are both related. A cable reel isn’t very much money (<$100) and not very hard to change.

As for Honda Care coverage, I’m not 100% sure, but it looks to me that all the parts in the SRS system would be covered, unless there has been an accident involved.