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Car Forum / Honda Cars / July 2005Odyssey 2000 EGR system
My engine check light came on and the ODB code indicates restricted EGR flow. Looking briefly I see what appear to be sensors in the exhaust before the cat con and in the cat con itself, but I do not see the EGR valve nor the line to it. Anyone familiar with these enough to tell me if this is a reasonably easy service job and where the EGR valve is located? Also, and curious, the TCS light has intermittently come on when the engine check light was on. Neither has come back on since I reset the codes and have driven it several trips, including up to 60 mph with decel. several times to get the EGR system check to operate. I wonder if maybe there is a bad ground or transients in the system. I see complaints of erratic engine check lights and unreliable ODB codes on Hondas of this era. Anyone have some knowledge of this stuff? Any recommendations for service manuals would be appreciated. I intend to order the Honda manual, but if there are others that are more useful I'd like to know. The van has 80K miles on it. I am an electronics tech working on repairs at the component level and have a DIY level of auto repair skill that is above average. Thanks, Leonard : My engine check light came on and the ODB code indicates restricted EGR : flow. Looking briefly I see what appear to be sensors in the exhaust before : the cat con and in the cat con itself, but I do not see the EGR valve nor : the line to it. Anyone familiar with these enough to tell me if this is a : reasonably easy service job and where the EGR valve is located? : Also, and curious, the TCS light has intermittently come on when the engine : check light was on. Neither has come back on since I reset the codes and [quoted text clipped - 3 lines] : check lights and unreliable ODB codes on Hondas of this era. Anyone have : some knowledge of this stuff? : The van has 80K miles on it. I am an electronics tech working on repairs at : the component level and have a DIY level of auto repair skill that is above : average. As well as replacing the EGR valve, you'll need to remove the intake manifold and get all the carbon out of that, too. There is a kit available from Honda that has a teflon coated pipe to fit into the EGR port to reduce the tendancy for it to clog. It's about a half a day job for your first time. The TCS light and check engine light are probably trying to tell you that your transmission is failing. Get it into the dealer and they'll get you a rebuilt one put in for free. These are covered out to 100k miles. Unfortunately, your EGR system is only covered out to 80k miles. If you've got a really good relationship with your dealer, they might let you slide if you're just past 80k, otherwise, no. Check out www.odyclub.com for a lot of info on both these common problems. >: My engine check light came on and the ODB code indicates restricted EGR >: flow. Looking briefly I see what appear to be sensors in the exhaust before [quoted text clipped - 28 lines] > >Check out www.odyclub.com for a lot of info on both these common problems. tcs light usually comes on with the egr code, by the way tcs doesn't involve the tranny it gets all its info from the abs sensors. Chip >>: My engine check light came on and the ODB code indicates restricted EGR >>: flow. Looking briefly I see what appear to be sensors in the exhaust [quoted text clipped - 46 lines] > involve the tranny it gets all its info from the abs sensors. > Chip What causes the TCS light to come on with the EGR code? Leonard :>: My engine check light came on and the ODB code indicates restricted EGR :>: flow. Looking briefly I see what appear to be sensors in the exhaust before [quoted text clipped - 32 lines] : involve the tranny it gets all its info from the abs sensors. : Chip Yup, Chip is right. TCS light comes on when the EGR system acts up. I had the transmission, EGR, and cat conv problems all at the same time and got my symptoms mixed up. Let us know how your repairs go! >:>: My engine check light came on and the ODB code indicates restricted EGR >:>: flow. Looking briefly I see what appear to be sensors in the exhaust before [quoted text clipped - 38 lines] > >Let us know how your repairs go! as i recall it's a PIFNH system fail code, the traction control doesn't work because the engine is in open loop mode constantly. It's just the way it is. Chip Agreed, the TCS comes on the same time as the check engine light for an EGR flow problem, mainly because the TCS also uses vacuum pressure. I suspected the TCS might be using vacuum. If this is the case, however, why would a clogged EGR system be the souce of the error. If there was a vacuum loss, then a drop in EGR flow might be a symptom of the vacuum loss? If the EGR flow is restricted, the vacuum should increase if everything else stays the same, should it not? I assume that EGR flow is into the IM, not the other way around. Maybe the TCS shuts down with any engine malfunction? Is this stuff covered in the service manual or is there additional training literature? I have seen enough posts on various forums to make me wonder how reliable the codes on Hondas of this era might be. I work on electonics and know how something as simple as ground integrity or a little noise can affect a data bus or corrupt an EEPROM. I am wondering if there is a problem at all. At about the same time that the engine and TCS lights came on I had a strange control problem in the AC. The modes would not switch and it came on in the defrost mode instead of the normal auto mode. None of the problems have occurred again. I'll plot the data on the fuel economy today and see if there are any changes there, but an initial look indicates no problem. Leonard > Agreed, the TCS comes on the same time as the check engine light for an > EGR flow problem, mainly because the TCS also uses vacuum pressure. |
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