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Error code P1687 typically indicates a problem with the communication between the engine control module (ECM) and the transmission control module (TCM) in a vehicle. It often signifies that the TCM is not receiving a proper signal from the ECM, which can lead to issues with transmission performance. Common causes may include wiring problems, faulty connectors, or issues with either control module. It's advisable to have the vehicle diagnosed using a professional scan tool for accurate troubleshooting.
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What does this trouble code p1687 mean for a 1999 Chrysler cirrus?
Trouble code P1687 means: No Mechanical Instrument cluster bus message
P1687 driver 5 line 7 dodge Intrepid What does Drivr 5 Line 7 mean and were is it and how do I fix it?
Dodge P1687 is -P1687-No Cluster Bus Message More than likely a faulty PCM.but will need further diagnosis using a flow chart for this code.
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