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Town & Country/Grand Caravan Problem Codes



  • xwesxxwesx Fairbanks, AlaskaPosts: 8,391
    P0032: HO2S Heater Control Circuit High (Bank 1 Sensor 1)

    Now, what does that mean.... hmmm..... ?
  • srs_49srs_49 Posts: 1,394
    This involves one of your front (ahead of the catalytic converter) O2 sensors. They have a heating element in them to make them reach operating temperature faster, so that the ECU goes into closed-loop operation sooner thus reducing emissions.

    This code indicates something is wrong with the heater for that O2 sensor. The heater element in the sensor could be bad; there could be a wiring/grounding problem; or whatever sends the +12V to the heater could be bad.
  • on my 2001 town&country with the car off push the button on the milage counter when the trip portion is up hold it for 5 seconds and have a pen and paper ready if its the same it will give you the softwear version first then the ready to write mine went kinda fast..LOL good luck
  • My 2005 Grand Caravan had engine light several months ago. On 7/12/09, the dealer replaced the Exhaust Gas Circulation Valve.The engine was cleared.
    * On 9/04/09, 814 miles later, I took it to Emission testing, and it failed - "Test failed due to excessive OBD monitors not ready, return after the vehicle has been driven in accordance with the manufacturer drive cycle." The testing operator and the dealer told me to drive more, and I did.
    * On 9/21/09, after 463 miles later, I took the van for the Emission Testing again. This time the testing was 'Aborted': "Test aborted due to excessive OBD monitors not ready, return after the vehicle has been driven in accordance to the manufacturer drive cycle." After talking with Dodge engineer, the dealer replaced anoth sensor - The Oxygen Sensor.
    * On 10/22/09, after 466 miles later, I had the Emission Testing again. The test was aborted again. Due to the same 'Excessive ODB monitors not ready ....
    * Then after checking the van, the dealer said the computer was defective. They ordered it and replaced it on 10/27/09. The dealer told me to drive for 50 miles and it should be fine.
    * On 10/30/09, after 92 miles of driving, I took my van for the Emission testing. The test was aborted again due to the same "Excessive OBD monitors not ready, ..."
    My big question is: What is wrong with my van? Right now I suspect that it might be something wrong with the Testing program itself.
  • xwesxxwesx Fairbanks, AlaskaPosts: 8,391
    It might have to do with the type of driving you do. If you take short, low speed trips, there are several loops that will not complete. I have had a couple cars that post periodic trouble codes, so I keep my scanner with me and read/clear them as necessary. Many times, I have done this only 20-30 miles prior to an emissions test, and it went without hiccup. However, my trip to the test site involves mostly highway driving, which is a required part of the loop.

    You should be able to get ahold of the procedure in your owner's manual or from the dealer. If you follow that and still no luck, maybe it is the test facility. Have you gone to the same one every time? If so, try a different one.
  • Thanks very much for your comments.
    I want to clarify that most of the mileage was on highway drives. My issue right now is that the dealer has no idea what is wrong. The dealer mechanics have contacted the Dodge co. several times, as I was told. To me, they all are just guessing. They have replaced two exhaust related sensors and a computer (maybe just a module?). Yesterday, I talked with the dealer again, and they said they have to talk to Dodge engineer again.

    I also talked yesterday with a Connecticut DMV emission engineer on the phone. He said would call me and would see me at the testing station today. But so far, he has not called me yet.

    Have you had any experience with testing stations that their softawre were not compatible to all kinds of cars.

    Note: A few weeks ago, before the computer was replaced, a friend of mine used his tester (a $50-kind) to checked my van out after I had told him the issue. We found every thing was good, but a few days later I took the van to have the test again and it was aborted again.

    I have spent more than 10 trips between the test facility and the dealer in two months. It was fortunate that I have just lost my job and had time for this headache.

    Thanks again.
  • xwesxxwesx Fairbanks, AlaskaPosts: 8,391
    I have never experienced compatibility issues with the testing computers. That said, I have only run three different vehicles through computer-interfaced emissions testing and all of them were late 90's models (OBD II).

    Your 2005 model likely uses the OBD II CAN interface, but I still would not expect there to be compatibility issues. As I recommended before, taking the van to a different testing shop could help clear that as a possible source.

    Also, your dealership should be able to use a laptop-based real-time scanner to monitor the vehicle while it is in use. If a circuit is failing to set as "ready," I would think a program like that could help pinpoint the source fairly well.
  • This morning, I took my van to a Technical Center of the Connecticut State, and had my van retested. After I had explained and showed all the documents from the testing facility and dealer, the Technical Center retested my van. The test was PASSED. I asked what was the problem. The answer was "Some cars are very difficult to test."

    When I got back home, I looked at the 'Vehicle Inspection Report'. They used PCTSI test type, instead of OBDII that the testing facility had used before.I do not understand the difference, but there is a comment at the bottom of the report:

    "This vehicle is not ready to determine the status of the pollution control system and the vehicle received an alternate emissions test. On the next inspetion cycle, this readiness failure may result ina reject of the vehicle."

    This means that I'm not out of the hook yet!
  • xwesxxwesx Fairbanks, AlaskaPosts: 8,391
    Sounds like they ended up passing it based on the tailpipe emissions.

    It is odd that something is preventing it from being in "ready "status, yet you are getting no codes indicating a bad sensor or some other fail. Perhaps monitoring your fuel economy, etc., over the next year or so versus prior (if you did that at all) will help to determine the source.

    At least you can keep driving it for the time being!
  • I am having a similar problem with a 99 caravan. Ready codes will set but once I cycle the key they will reset. I have had at least 3 tests and drive the vehicle with a scanner to monitor them. My frined had a similar problem on a liberty, they found the PCM was losing memory when key was off. the constant to the PCM was not working. I am in the process of getting a pin out to check if that is what is wrong with my van. My brother in law is a chrysler mechanic and he is stumped as well. We are checking the 12 volt to the pcm to make sure they are being provided. Don;t know if this will help but thought I would mention.
  • I have a 2005 Dodge Grand Caravan with a 3.8L engine. With the check engine light on, I had it diagnosed and it shows a code: P0073. Where do I find this part in my vehicle and how do I replace it with a new one?
  • srs_49srs_49 Posts: 1,394
    P0073 => Ambient Air Temperature Sensor Circuit High Input

    I don't know where that is located on a late model 3.8L engine. I would guess it's somewhere along the intake air path, either before or after the air filter.
  • Check engine light came on this morning. Checked code and it showed P 0032. Based upon previous posts, looks like this is an o2 sensor. Funny thing is that my wife said it seemed that the heater for the interior wasn't putting out alot of heat over the past several days, and she just didn't think to mention it. I checked the water level, and it was very low. Added water.......of course the check engine light is still on and I am pretty sure this had nothing to do with the water level. Anyway, we are leaving in 2 days for Florida with the kids and it is about an 800 mile drive down I-95. Should I be concerned with having troubles? I have had some emessions sensors that I have had to replace over time (van has 108,000 miles), and have been told to eventually replace it. I don't mind driving like this by myself, but it is different with the wife and kids. Any input is greatly appreciated.
  • srs_49srs_49 Posts: 1,394
    P0032 is the heater for an O2 sensor that's located ahead of the catalytic converter. The ECU thinks the heater resistance is out of range.

    O2 sensors need to be at a high temperature before they start to work properly. The heater is there to warm up the 02 sensor faster than might otherwise happen, especially in cold climates.

    The 02 sensor itself is probably OK, otherwise you would have seen a different or additional OBD-II code. You should plan on getting it replaced, but are probably OK for the drive to Fl.
  • My '02 T&C has been acting up by surging when brought to stop, then sometimes stalling. Intermentantly, when starting out from stop it will 'skip' (like a missing cylinder or two) but when running at any rpm any other time runs smooth.
    The Speedometer will go from 65 to 20 and back to 65 while on highway (no change in actual speed or engine rpm). Does this at slower speeds too.
    Trouble codes are; P0601, O2, and evap. I don't believe the first is related to other two. Also have a text description of 'internal fail check sum error' message.
    Local tech seems to think it is PCM (transmission?) computer. I am under impression that there are two computers ... one for engine and one for transmission?
    What say you?? (Help!)
  • ndwyerndwyer Posts: 2
    I have a 2004 town and country van with a 3.8L motor and the engine light is on. my friend has a code reader and the codes that came up were p0073(pd) ambient air- temperature sensor circuit- high imput ambient. the van runs fine and does not overheat. does anybody know what these codes mean?
  • srs_49srs_49 Posts: 1,394
    It means the ambient air temperature sensor is probably bad. It has nothing to do with whether or not the van overheats.

    Have the sensor replaced.
  • ndwyerndwyer Posts: 2
    thank you i will try that.
  • First we had amessage about our gas cap. Checked it, took it off, put it back on...tightly. Message went away. Few days later, the check engine light came on. Took it down, got a air leak code. Figured it was the gas cap. Replaced the gas cap. Light is back on. Is there any easy way to figure this out without a trip to a mechanic?
  • You know where's the camshaft sensor on 2001t&c can you help me to find this thank
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