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Vans & Minivans Chrysler/Plymouth Voyager, Dodge Caravan Dodge Caravan/Chrysler Voyager
2361 messages, Last post on Nov 18, 2009 at 1:15 PM
You are in the Chrysler/Plymouth Voyager, Dodge Caravan Forum. Your Host is Karens
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Replying to: jennydawg (Apr 12, 2009 2:47 pm) Random/Multiple Cylinder Misfire Detected What does that mean? Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly. A P0300 OBD DTC code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why. Symptoms may include: the engine may be harder to start the engine may stumble / stumble, and/or hesitate other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: Faulty spark plugs or wires Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector(s) Burned exhaust valve Faulty catalytic converter(s) Stuck/blocked EGR valve / passages Faulty camshaft position sensor Defective computer Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors. Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
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Replying to: joepeterson56 (Apr 12, 2009 8:21 pm) Peace & Wellness~ |
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When I come to a stop my idle drops down to about 500 RPMs while in drive. then I get check engine light on. In checking the code it reads P420 Catalyst System Efficiency Below Threshold (Bank 1). This light does not come on if I put it in Neutral when I come to a stop. In fact, the RPMs, remain at about 750. Can you please help me decide what is going on
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Replying to: docbunner (Apr 13, 2009 7:38 am) Catalyst System Efficiency Below Threshold (Bank 1) What does that mean? The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system. Symptoms You will likely not notice any drivability problems, although there may be symptoms. Causes A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for An oxygen sensor is not reading (functioning) properly The engine coolant temperature sensor is not working properly Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe Retarded spark timing The oxygen sensors in front and behind the converter are reporting too similar of readings Possible Solutions Some suggested steps for troubleshooting a P0420 code include: Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady). Inspect the downstream heated oxygen sensor (HO2), replace if necessary Replace the catalytic converter One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into. |
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Replying to: okamt (May 10, 2005 8:09 pm) |
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My 1996 Dodge Caravan can not be inspected because the "on-board computer is not compatable with the state's inspection computers". When you run the reguired tests, the process quits and machine reads: TEST ABORTED. Do I need a whole, new, more modern on-board computer or is this a fuse/fuse box fix that I should for? |
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| hi...I have an 04 Voyager..can anyone tell me if there is any difference in the suspension between this model and the previous model...I have access to aftermarket sway bars from the previous model and would like to fit them to my 04...thanks | |
My 2007 3.3 ltr Grand Caravan with 42,000KM, has developed a whine that is not really loud but gets louder when hot & is quite noticeable when you turn on the A/C. The pitch of the whine changes as you rev up the engine. If on a steep hill (down) & put it in low gear to ease down slowly you can hear it quite loud. When I first complained, Dealer replaced the Alternator & idle saying the bearings were not good. Next they changed the A/C pump when I pointed out that it got louder when that clicked on and off. No change after either "fix". They say it really isn't that loud and is a normal thing. They contacted Chrysler and were unable to find any help there - it really isn't a problem (unless you are the one driving it!)... Today they took it in and to make me happy they took the trans. pan off, checked the oil & all components & found it was all good. No problems. No fix. Noise still there. Suggestions?
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My 2003 Dodge Grand Caravan just failed smog due to the EVAP leaks. Can you tell us what needs to replace? Is it a vacuum hose or is it a major fix. Thanks for your time.
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I have a 2001 grand caravan and my interior sliding door buttons do not work. My keypad button does open the door. any ideas. thanks
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