Elantra XD (2001-06) :: Check Engine Light Turned On - Codes P0422 And U0D00
While on my 20 mile commute my check engine light turned on, attached the code reader to the car and got codes P0422 and U0D00. Looked up the P0422 code to find "Caralyst efficiency below normal (bank 1)" I have a list of possible fixes but have no luck finding out about the U0D00 code. I notice I lose and a quart of oil every month and when I start the car, the first 5 seconds or so the engine revs to 4000 rpm.
View 1 RepliesPrius (2004-09) :: Check Engine Light Turned On For A Few Hours Then Turned Off
I always take care of my car oil changes on time. And in the last week my check engine light turned on for a few hours then turned off. And today it turned on again. I kinda regret getting rid of my scan gauge now.
View 11 RepliesFord - F150 :: 1993 - Check Engine Light At 60 Mph
My check engine light has been coming on at 60mph. It will go off at 58 or 65mph. I could drive those speeds on the freeway, but would rather repair the problem. I've replaced the O2 sensor after 180,000 miles. I did notice I have a 2 inch hole in my muffler.
View 3 RepliesFord - F150 :: Check Engine Light Intermittently On Due To Overheated O2 Sensor
Have 1994 F150 with 5.0L engine. Check engine light, intermittent on due to overheated O2 sensor. Replace sensor, light goes off. The sensor will last longer in cold weather but will fail with same code. Is the overheating due to an electrical problem from the ECU or ambient tempreture. Would like to sell truck but don't want to hand the buyer a dozen O2 sensors.
View 3 RepliesFord - F150 :: Check Engine Light Started Flashing / Cylinder 4 Misfire Code
1997 Ford F150 - 133K Miles - 6cyl - 4.2L. This is a truck that gets less than 2K/year put on it. Has had "issues" with worn bearings and holding oil pressure for a few years now. Yesterday, the check engine light started flashing (as opposed to solidly lit) and the code came back as a cylinder #4 misfire (only the one code). The truck was clearly not firing on all cylinders and at idle, ran terribly (couldn't be driven). I just did a compression test on all the cylinders and all measured around 140-145psi except the #4 which read almost 170psi. I rechecked this a few times as well as a couple of the others and am now sure of the results. What could cause this one cylinder to have a higher compression ? Is whatever is causing this increase in the compression, also be the cause of them misfire ?? I'm stumped here and quite frankly, expected the compression on the #4 cylinder to be really low as opposed to the others.
View 13 RepliesFord - F150 :: 1998 - Check Engine Light On And Error Is Bank 2 / System Too Lean
My vehicle is a 98 F150 5.4 ltr Triton. I got a check engine light on and the error is "bank 2, system too lean." I read that this can be caused by a few different things like vacuum leaks or fuel filter and so far I haven't been able to narrow down. It started with occasional shaking at idle and its happening more as time goes. When at idle it often makes a sound like slurping the bottom of a drink with a straw and shakes intermittently. The fuel economy seems to have gone down. Sometimes it seems like it almost dies in idle, but always keeps running. It runs great when I push on the gas.
View 4 RepliesPassat (B5) :: Check Engine Light Turned On Whenever Put Gas In Car
I have a 2001.5 passat and the check engine light turned on. It just so happens that whenever i put gas in the car.... and try to start it back up, it won't start! it takes about 3 or 4 tries for it to start up.
View 3 RepliesGolf IV R32 :: Check Engine Light Turned On
Bought an R32 yesterday. used of course.. was doing fine feels like a brand new clutch. got it from a ford dealership, and the check engine light just turned on. I will go back for the 14 day policy but i was wondering if it could be my clutch.
View 8 RepliesLexus SC430 :: Check Engine Light Turned On
My check engine light just turned on recently. Just hit 115K miles on my SC430 a few weeks ago. Is there a service that I'm missing? Running absolutely fine, oil change recently as well.
View 14 RepliesPrius (Gen 1) :: Check Engine Light Turned On - HV ECU Malfunction
This morning, I tried to start the 2003 Prius and got a 'check engine' light and nothing. The cabin lights were bright so the 12V looked OK. After three tries, I used the VOM and measured 12.55 V on the battery. But the traction battery level looked unusually low.
So I tried again and it started. Using the ScanGauge, no codes were displayed. So I turned the car off and on three times and cleared the "check engine" light. Then I connected the Auto Ingenuity and read out:
P1636 - HV ECU Malfunction on the HV ECU to ECM bus.
C1213 - HV ECU Communication Circuit Malfunction between HV ECU and Brake ECU
P3002 - HV ECU Communication Malfunction on the HV ECU to Battery ECU
So it looks like there was an HV ECU problem that 'cleared while testing.' Certainly it makes sense to inspect the HV ECU connectors and re-seat them and clean out any debris.
Prius (Gen 2) :: 2005 - Check Engine Light Turned On
My 2005 Prius has 105,000 miles. The check engine light came on for the first time ever. Dealer will diagnose tomorrow. If it's the main battery, should I sell it?
View 3 RepliesPrius (2010-12) :: Check Engine Light Came On And Turned Off On Its Own
My check engine light went off last month and when I had it looked at my dealership they said it was due to the seal where the gas cap locks into I believe. Anyway, a week later my light went off again and now they are saying it is the charcoal cannister which I found out is very expensive. Here are my two questions. First of all, can I get this part replaced and installed at a non-dealership? My second question is since they reset my check engine light, it came back on a few days later for two days and then turned off completely. Should the light have turned off on its own? Should I be concerned that it is no longer on? It just makes me wonder if they diagnosed this issue correctly or not.
View 7 RepliesFord 7.3L Power Stroke (1999-2003) :: 2002 F350 - Check Engine Light Not Coming On When Ignition Turned On?
2002 F350 7.3 PSD. 192k miles.
From my understanding, a CEL is supposed to illuminate each time you turn the ignition ON as part of normal startup procedure.
I figured the previous owner must have pulled out the bulb to hide the fact that the truck had a few "issues" before selling it, so today I pulled out the gauge cluster and it looked as if the CEL bulb was a tiny LED soldered directly into the gauge cluster itself. There were a few serviceable/removable bulbs for things like turn signal indicators, high-beam etc... but the CEL did not have a serviceable/removable bulb.
I've been driving this truck and working through it's "issues" and fixing things as I go, but it keeps throwing codes without the CEL illuminating. What's going on here?
I thought the check-engine-light was supposed to illuminate each time the ignition was turned on, and that it would come on each and every time the vehicle registered a fault code in the ECU/PCM.
Toyota - Highlander :: Check Engine Light Turned On At 102,000 Miles
My check engine light came on at 102,000 miles. The dealer service dept. says that the diagnostic showed no clear cause(?)but I need new spark plugs ($240),ejectors cleaned, and of course the cost of the diagnostic ($130) The total was around $475. Am I being ripped?? My big question is what will they do to get the light out?? Should I disconnect the battery and reset the clock and radio buttons to see if it goes out? Then I can worry again if it comes back on.
View 30 RepliesHyundai - Elantra :: 2007 - Check Engine Light Turned On
I have a Hyundai Elantra 2007 with 123,000 miles on it. Three weeks ago the engine About two weeks ago the engine light turned on. I took it into an auto parts store so they could use the digital code reader, it said the upstream O2 sensor needed to be replaced. I replace it and still have bad gas mileage, the second time I had it read with the code read it said both of the O2 sensors were bad so I replaced the downstream one week later. There was still bad gas mileage and the code reader still said it was both of the O2 sensors, the auto part's representative said when the engine light is on that the computer turns off the O2 sensors so he recommended to erase the codes on my car with the code reader (I pushed the button and he looked away). Still nothing changed so I disconnected the negative terminal on the battery to restart the computer. Still horrible gas mileage with no engine light anymore. Gas mileage averages about 15 mpgs in city and 32-35 on the highway. The highway seems about right but I've never seen any mpg below 30 for city mpg before this problem. I also cleaned the mass air flow sensor with mass air flow cleaner after dealing with the O2 sensor. All preventive maintenance is kept up by me and I have had no problems with this car before. Water pump replacement, timing belt replacement, and transmission flush have occurred in the last ~50,000 miles.
View 19 RepliesChrysler - Lhs :: 1994 Check Engine Light Came On When Key Turned But Goes Out When Car Started
My mother in-law has a 94 Chrysler LHS, 3.5 V6, auto, 66k. Yesterday she was driving home and said the check engine light was on. I went to check it out and the light was not on. The light come on when the key is turned on but goes out when it is started. This is not an OBD-2 car it has a little blue plug and i do not have a code reader for it. Took it to auto zone and they do not have a code reader for this car. Auto Zone and Pep Boys both told me that if the light is off there will not be a code. Further checking on the internet I found out you can get a two digit code by turning the key on and off and count the flashing check engine light. It worked I got code 12 and 51. 51 means lean O2 sensor. If this is true that why does the CEL not stay on. How can I test the O2 sensors?
View 2 RepliesPontiac - Sunfire :: 2002 - Check Engine Light Turned On Again?
Check engine light issue. For the past 3 months, my check engine light has been turning on. The first time it happened, the garage replaced the EVAP Purge Solenoid (which includes the vapor can purge solenoid and the EVAP canister purge solenoid). Of course, a few months later, the check engine light turned on again. The second time, the garage replaced the gas cap. Then the check engine light turned on again the next day.
So, the third time, the garage performed maintenance/repair on the vapor can purge solenoid and the EVAP canister purge solenoid. Of course, three days after driving my car, the check engine light turned back on. I've contacted the garage for the fourth time now. I explained that their diagnostics have obviously been exhausted, and they aren't really sure what the problem is. I'm going back in a few days to speak to the lead mechanic hoping to be compensated for their guess-work or at the least to be given an honest "I don't know" answer.
Saturn - Vue-hybrid :: Check Engine Light Turned On - Code Says POAC
I have a 2007 Saturn vue hybrid that has the check engine light on-the code says POAC. I can't find anything on the Internet what this code means. I'd like to fix it myself instead of bringing it to a dealer and getting charged big bucks! What this code means?
View 3 RepliesAccent RB (2012+) :: Check Engine Light Turned On / Code P2196 Always Comes Up
I love my car 2012 Hyundai Accent GLS but once it hit 60K miles, the engine light came on and it has been eating gas. I get up to 160 miles per tank now. My MP fluctuates from 12-25 MPG. I literally watch it jump when I fill up the car, then a few miles later, it drops again. Code P2196 always comes up. (stuck rich)
Dealer advised me to do fuel system flush.
Dealer replaced upstream o2 Sensor
Dealer replaced Check Valve
New Spark Plugs last Fall due to hearing really loud spark knocking... and also re-gapped last week. Now I can hear them slightly again.
Engine light just came back on after almost 200 miles.
Reading some other threads- apparently this seems to be a known issue for my car.
I am wondering if I should try replacing the downstream o2 sensor.... OR consider trading my car.