Got DTC P1676 or TCS DTC
31? Replace the Ignition
Switch
NOTE: This article applies to '00-02 Accord V6s
and '99-02 Odysseys.
Got a vehicle in your shop with DTC P1676
(FPTDR signal line failure) or TCS DTC 31 (engine
retard command [PFINH] signal)? A bad ignition
switch (the electrical half) could be the culprit.
NOTE: On the HDS, you'll see TCS DTC 31 listed
as TCS DTC 31-2.
Inspect the ignition switch solder joints for any
signs of overheating. If you notice the solder joints
are melted, replace the ignition switch.
SOURCE: Question regarding a honda odyssey 1999 check engine light codes.
Ramon
P0420 relates to the catalytic converter. The computer sees little or no improvement in the exhaust before and after going through the converter. Either your oxygen sensors need replacement (3 total) or you need a new catalytic converter.
What is the mileage on the vehicle? Does it run well? Oxygen sensors generally start to fail after 70,000 miles. Catalytic converters usually fail because the engine is runnig rich and the owner ignores that fault for months. This causes the catalytic converter to overheat and fail.
P1456 relates to the evaporative emission system. This system holds the gas fumes in the system so they are not vented to the atmosphere. The most common cause of this code being set is failing to properly tighten the gas cap after refueling. Take the cap off and clean the sealing O-ring. Put it back on and tighten till it clicks 3 times. Make sure you have the correct gray colored gas cap. Clear the code and see if it resets within a few days. If it does, try replacing the gas cap.
Charlie
SOURCE: Check Engine Light
I had the problem with the engine light and the ESC light on. At the same time the car would not accelerate. I disconnected and reconnected the battery and works fine now.
SOURCE: check engine light comes on and off, auto zone
The EGR valve helps your car more efficiently and completely burn fuel
by recirculating a portion of your exhaust and running it through the
combustion process again. When the EGR valve goes bad, it must be replaced.
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum
controlled valve which allows a specific amount of your exhaust back
into the intake manifold. This exhaust mixes with the intake air and
actually cools the combustion process. Cooler is always better inside
your engine. The exhaust your EGR valve recirculates also prevents the
formation of Nitrogen related gases. These are referred to as NOX
emissions, and are a common cause for failing emissions testing.
Unfortunately, your EGR valve can get stuck, causing NOX gases to build
up. You'll know if your EGR valve is stuck or malfunctioning because
your car will experience symptoms like rough idle and bucking on
acceleration.
Here is a picture of where the EGR
Valve is located (Accord 1999). Replacing it is fairly simple and straightforward. A
vacuum line and a couple of bolts. You'll see what you have to do when
you look at it.
If you
are replacing the EGR Valve due to the Check Engine Light (MIL) being
on with a DTC P0401 then I suggest contacting your Honda Dealer. There
was a Product Update Campaign (PUD) in the fall of 1999 that corrected
the problem.
Another times, the clean is the solution...I hope help yoiu with this. Good luck, and remember rated this help.
Testimonial: "Thank you very much your knowledge and information you offered concerning my problem and following questions were VERY helpful!(I lost owners manual)"
SOURCE: My 2002 Honda Odyssey check engine light came on,
You need to take it to a real mechanic. The codes should be cleared and than the car rechecked to see what comes up.
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