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DTC Codes - P0700-P0899 – Transmission


P0700 Transmission Control System Malfunction
P0717 Input/Turbine Speed Sensor Circuit No Signal
 

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Most likely a connector contact issue. Re-seat connectors if this solves thr problem add dielectric grease to connectors in question.
 

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What connectors should I be looking at on the TCM and BCM
Only one on the TCM. The 2 blue/gray on the BCM are usually the culprits. Also sometimes the wiring harness will rub and wear through close to the thermostat housing. Check if plastic armor is intact.
 
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I have a cobalt 05 with code p0700 and P1516, I purchased TCM replacement, but car still hard shift from gear 1 to 2 only this happen every morning and when car parked for hours need help please
 

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Not wires, connectors.

 

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I give up!
 

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Does your code often reappear therefore trigger the CEL on 2nd appearance or is it infrequent? How does the car actually behave? There is one thread that explains it: 68121-my-car-jerks-hard-when-shifting.html and the one I posted: 101948-hard-shifting-no-iss-start-no-codes.html.
 
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