QuestionQUESTION: Upon the advice of a Dodge Dealer, I've replaced both speed sensors & reset engine light. Drove 15 miles and I've noticed transmission is fine, till it reaches normal operating temperature and in the course of driving, it will downshift around (10 to 22 miles per hour)into the LIMP MODE. I'll have to turn the engine off for a few minutes, restart, then it's fine until it decides to go into LIMP MODE again. What are the problems??? Thanks!
ANSWER: Hi Robert
We need to get the fault code which would explain why it goes into limp mode. Try turning the ignition key on-off-on-off-on and leave on doing that in 5 seconds or less elapsed time. Then watch the odmeter window to see if the mileage changes to show any 4-digit numbers. If that does give a number, then get a free code readout at an Autozone or similar nationwide auto parts store. Let me know once you have a number.
Roland
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QUESTION: Roland
The code reads:P0138
Robert
AnswerHi Robert,
That code is not a transmission fault code, so you will have to get a readout using a plug-in reader. Did the dealer do such a readout? If so, did you get a copy of the work order that listed the code number? On many vehicles the ignition key method taps into the engine controller, not the transmission's. But you gave it a try.
So try again using a reader that plugs into the socket under the dash by the steering column and specifically seek to read the memory of the transmission controller. If you can't get it for free, an independent shop will do it for under $40 usually. You might even go to a transmission shop if you know of an honest one to get the codes.
The 0138 is saying that the downstream oxygen sensor that carries the exhaust from the right side cylinder bank has a signal that appears to be false in that it is maintaining a constant voltage similart to the supply voltage for the sensor (i.e. a short circuit). The sensors have very easily damaged wires so I suspect you will solve this one by replacing that sensor which is located downstream from the catalytic converter.
Roland
