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I got error code P1660 and P0725, the RPM meter worked at…

Customer Question
I got error code...

I got error code P1660 and P0725, the RPM meter worked at cold but after about 10 min it fluctuated and dropped to 0 but engine still running OK

Mechanic's Assistant: How many miles are on the car? Do you have scan tool or a code reader?

I got code reader. Car is 114K miles

Mechanic's Assistant: Are you fixing your MINI yourself? What have you tried so far?

I flushed transmission fluid and put new in did not help. Plan to check ignition coil, main shaft speed sensor and input speed sensor I try to locate positions of these sensor

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I want to know how to fix these codes and rpm meter problem

Submitted: 11 months ago.Category: Honda
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Answered in 5 minutes by:
9/15/2017
Mechanic for Honda: Dan, Technician replied 11 months ago
Dan
Dan, Technician
Category: Honda
Satisfied Customers: 26,039
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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Mechanic for Honda: Dan, Technician replied 11 months ago

What year and model is your vehicle? Thanks.

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Customer reply replied 11 months ago
my Honda accord 1995 V6 got these issues.
Thanks
Mechanic for Honda: Dan, Technician replied 11 months ago

This usually means the ignition coil has failed. The ignition coil has a resistor built inside, so the tachometer signal is buffered to the TCM and tachometer. Look for a constant tachometer signal from the Blue (BLU) wire at the ignition coil. If the signal is erratic, suspect a faulty ignition coil. The resistor is part of the coil and to repair the problem, the coil will need to be replaced. Let me know if you have more questions or if there is anything else I can do to help, thanks.

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Mechanic for Honda: Dan, Technician replied 10 months ago

Ever get it figured out? Please do not forget to rate answer. Thanks.

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