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11: No crank signal to computer. Fault in wiring between crankshaft position sensor (CPS) and ECM ( PCM or computer ) or faulty CPS.

12: Battery disconnected. Battery or power to the ECM disconnected in the last 50 key cycles.

66: TCM to PCM failure. No message from the Transmission Control Module (TCM) to the Powertrain Control Module (PCM)

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Q: 1997 jeep Cherokee error code 66 and 11 and 12?
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