Question about 1994 Jeep Grand Cherokee

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Obd2 code identified '3-4 shift'

What is recommended repair?

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What is the actual code number ?

Posted on Jul 11, 2013

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I know this is late, but I got the same code recently. I have a flaky MAF sensor cable connector that causes my fuel trims to gradually drift out of range - - - until I wiggle the cable connector and it gets better again for awhile. The bad connection is on the cable side of the connector and the connector does not look easily disassembleable. Anyway this code comes up once and awhile when the connection gets flaky.

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Another site I found is here which will help you if you get other common code on your OBDII .... cheers.. Deneen



OBD-II codes consist of a number of parts. Here is a sample OBD2 code:

P0171
Here is a breakdown of what each digit of the code means:
First Character - SystemThe first character identifies identifies the system related to the trouble code.

  • P = Powertrain
  • B = Body
  • C = Chassis
  • U = Undefined
Second Digit - Code TypeThe second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.
  • 0 = Generic (this is the digit zero -- not the letter "O")
  • 1 = Enhanced (manufacturer specific)
Third Digit - Sub-SystemThe third digit denotes the type of sub-system that pertains to the code
  • 1 = Emission Management (Fuel or Air)
  • 2 = Injector Circuit (Fuel or Air)
  • 3 = Ignition or Misfire
  • 4 = Emission Control
  • 5 = Vehicle Speed & Idle Control
  • 6 = Computer & Output Circuit
  • 7 = Transmission
  • 8 = Transmission
  • 9 = SAE Reserved
  • 0 = SAE Reserved
Fourth and Fifth DigitsThese digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1). To lookup your particular code, visit our OBD Trouble Codes section.




OBD-II codes consist of a number of parts. Here is a sample OBD2 code:

P0171

Here is a breakdown of what each digit of the code means:
First Character - System

The first character identifies identifies the system related to the trouble code.

  • P = Powertrain
  • B = Body
  • C = Chassis
  • U = Undefined
Second Digit - Code Type

The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.

  • 0 = Generic (this is the digit zero -- not the letter "O")
  • 1 = Enhanced (manufacturer specific)
Third Digit - Sub-System

The third digit denotes the type of sub-system that pertains to the code

  • 1 = Emission Management (Fuel or Air)
  • 2 = Injector Circuit (Fuel or Air)
  • 3 = Ignition or Misfire
  • 4 = Emission Control
  • 5 = Vehicle Speed & Idle Control
  • 6 = Computer & Output Circuit
  • 7 = Transmission
  • 8 = Transmission
  • 9 = SAE Reserved
  • 0 = SAE Reserved
Fourth and Fifth Digits

These digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1). To lookup your particular code, visit our OBD Trouble Codes section.

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Transmission 2-3 shift began to fail. Had transmission service (Oil and filter) performed, and 2-3 solenoid replaced. Shift problem is about same, error code reports solenoid problem again. Repair shop...


I am a 24 year ford master tech, and over the years we found the harness in the transmission was the cause and not the solonoid as you described, In rare cases the valve body was clogged back forcing the flow, My first bet is the harness INSIDE the transmission

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Check engine light is flashing, and engine seems o.k. but seems like transmission slips before shifting. or hesitates to shift. I checked the engine oil and the transmission fluid. they are both o.k.


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Won't shift out of 3 gear


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My ford windstar mpv 1994, the overdrive light is continously blinking. The vehicle moves sluggishly. When OBD2 coder reads:1) P0500 and 2)P0760.


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P0760 is the trouble code for transmission shift solenoid problem, This solenoid is IN the transmission.
Take the van to a transmission specialty shop or a repair facility you trust. Speed sensor can be replaced by the user if they are familiar but the shift solenoid should be done by a professional.

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We have a 1998 chevy blazer and we had my brother in law test the computer with the OBD2 and it read code "PO785" what does it mean


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