In fail safe or limp mode
#2
Join Date: May 2017
Location: Washington State
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Coupe 6MT Premium RAS
Ignore the P1815 for now, that's a minor inconvenience and probably just the microswitches on the shifter.
The other 3 codes are all related to the TCM not getting data from the ECM, disconnect the battery and get the car in the air and look for damage on the transmission harness, unplug the harness and look for corrosion/damage to the pins. Engine speed and throttle position data are all sent via CANBUS and you have a CAN communication error so that's likely where the problem lies.
Check the TCM harness as shown in the FSM.
The other 3 codes are all related to the TCM not getting data from the ECM, disconnect the battery and get the car in the air and look for damage on the transmission harness, unplug the harness and look for corrosion/damage to the pins. Engine speed and throttle position data are all sent via CANBUS and you have a CAN communication error so that's likely where the problem lies.
Check the TCM harness as shown in the FSM.
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