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How can i be sure which transmission speed sensor i need to replace.
2004 Honda Accord

How can I be sure which transmission speed sensor I need to replace.

(2004 Honda Accord)
The problems my car is having are as follows:
1. It won't shift into 4th gear.
2. Engine light came on.
3. TCS light is stuck on.
4. Gear position light flashes after I accelerate to 4th gear and slow down.
Some good clues:
1. The lower gears work fine.
2. The speedometer works fine.
3. At about 55mph the RPM's start getting high and the car will not shift into any higher gear. Again, the lower gears work fine, always.
4. Cruise control still works.
I have been told there are 2 sensors, input and output, how do I know which one needs to be replaced? AutoZone diagnosis comes up Speed Sensor. Which is the more common one needing to be replaced? Thank you for the help and input.
2 answers & 1 comment
Popular Answer
on December 01, 2016
In addition, most repair shops will have a 'professional quality' scan tool that can monitor transmission operation on live data screen while vehicle is being driven so an effective repair proceedure can be planned and the solution can be proven by qualified personnel.. Parts stores only have code readers and parts salespeople.
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on December 02, 2016
I originally took it to a transmission specialist and his computer came up "3rd" pressure switch. After replacing it the same problems resumed. Honda wants to charge me $46+ to diagnose it. At this point I put $116 into it. This electrical stuff is a headache. I already bought the speed sensor so I have to put it in, just not sure if I replace the input or output. Thank you for your feedback.
General Diagnosis
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on December 01, 2016
In addition, most repair shops will have a 'professional quality' scan tool that can monitor transmission operation on live data screen while vehicle is being driven so an effective repair proceedure can be planned and the solution can be proven by qualified personnel.. Parts stores only have code readers and parts salespeople.
Sign in to reply
on December 02, 2016
I originally took it to a transmission specialist and his computer came up "3rd" pressure switch. After replacing it the same problems resumed. Honda wants to charge me $46+ to diagnose it. At this point I put $116 into it. This electrical stuff is a headache. I already bought the speed sensor so I have to put it in, just not sure if I replace the input or output. Thank you for your feedback.
on December 01, 2016
The code that AutoZone read is a symptom, not a diagnosis. I'd recommend taking it to a qualified shop or dealer, it will likely save you money in the long run.
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