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  #1  
Old 09-20-2018, 11:43 AM
Edward Edward is offline
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Default P0720 on 2003 Sentra

I have a 2003 Sentra with automatic transmission. I replaced the speed sensor on the transmission (the one with the wheel) but still get the P0720 error code. Are there 2 different revolution or speed sensors on the automatic transmission in the 2003 Sentra? If so, where is the other one?
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Old 09-23-2018, 03:47 PM
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It sounds like you replaced the vehicle speed sensor. P0720 is for the revolution sensor on the transmission. This video should help:


YouTube
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Old 10-23-2018, 04:41 PM
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I went ahead and replaced both sensors, the revolution sensor and the speed sensor. I am still getting the P0720 error.

Any suggestions? I do not see any problems with the wires.
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Old 10-23-2018, 04:43 PM
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One more thing. After I clear the engine code error, the engine check light comes on when I try to accelerate to highway speeds.
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Old 10-26-2018, 10:23 PM
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Only thing I can suggest is get a copy of the factory service manual for your Sentra and follow the step-by-step diagnostics for the P0720 DTC. It might be a circuit issue or possible a mechanical issue with the gear the revolution sensor detects.
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