What are some symptoms of a bad idle air control sensor?
Idle air control valves open to allow more air to "leak" into the intake, raising the engine rpms, or close when not needed. When your AC compressor kicks in or power steering is activated as you suddenly turn the steering wheel, the sudden drag on the drive belt will bog down the engine. These systems send a signal to the engine computer telling it they are active and it then signals the IAC valve to open, which increases the engine speed. Without this occurring, the engine could struggle, or die. The IAC valve can cause weird idle issues, mess with throttle functionality or cause the car to die. Sometimes they fail, get stuck or just get all carboned up. Sometimes people have success at cleaning them, but generally it is best to replace them when bad. Idle issues and even problems with the IAC valve may not be due to the IAC valve being bad itself. An idle issue does not mean the IAC valve is bad. It is best to pay close attention to how the vehicle is acting, and then communicate that clearly and as completely as possible to your mechanic. Intermittent problems can be very hard to diagnose. Details will help. Knowing more about the vehicle in question and its symptoms (in detail) will also help in understanding more about what it is doing.
Where is the oxygen sensor located on a 1995 Honda Accord LX 4 cylinder model?
There are two: one at the exhaust manifold and one immediately behind the catalytic converter.
What does it mean if a Honda Civic check engine light is flashing?
Mike Stittman has got it covered. A flashing check engine light is indicative of the converter getting a way too rich mixture. You have the potential for the cat to go boom. Not good. And since this is the OBDII monitoring system a flashing “Check Engine” light means that same thing on any vehicle equipped with OBDII. OBDII started appearing on some vehicles in 1994 and was incorporated in all vehicles in 1996. For the most part, the codes and indications are universal regardless of the make of the vehicle.I'll bet your Civic's got some high mileage on it. I'll bet you've never had the 02 sensors changed. I'll bet you don't even know what an O2 sensor is. It's the O2 sensors that have a direct input to the engine management computer for maintaining proper fuel mixture ...air to fuel ratio. The O2 sensors have a normal service life of about 60-75K miles. They are like spark plugs in how they "fail" ...very slowly and over a long period of time. Sometimes a failed O2 sensor will put the check engine light on ...sometimes not.Get you car into a good reputable shop or the dealer and have the problem taken care of ASAP. And yes, it will cost money. Probably going to be an expensive repair. I'd earmark at least a grand ...O2 sensors are expensive and you may end up needing the cat replaced. Prepare for the worst ...be happy when it turns out better.
CHECK ENGINE LIGHT flashing then solid?
About a month ago, my check engine light came on. That same day it went off. Today I turned my car on and the check engine light started flashing, then it turned solid. What might the problem be? I need it to pass smog
What is the difference between downstream and upstream O2 sensor?
This isn't in reference to the Oil and Gas industry, this is an automotive question.In the US starting around the mid 70's, passenger vehicles that have an internal combustion motor were also required to have a Catalytic converter installed in their exhaust system. In more modern vehicles a total of 4 x O2 sensors are installed in the exhaust piping. Two upstream sensors (between the exhaust manifold and catalytic converter) and Two downstream (between the catalytic converter and muffler).The upstream sensor measures the air/fuel ratio and sends a signal to the ECU if an efficiency adjustment is required i.e. more fuel/less fuel to the EFI (electronic fuel injectors)The downstream sensors measure the efficiency of the catalytic converter itself in order to meet the EPA regulations requiring that all emissions components be monitored for failure.