DTC P1601: Pcm-TCM Communication Line Error: Condition

DTC is set when there is no immobilizer to Powertrain Control Module (PCM) communication. Possible causes are:

• Immobilizer unit malfunction.
• Clock spring malfunction.
• Key transponder malfunction.
• PCM malfunction.
• Short or open in circuit between immobilizer unit and PCM.
• Short or open in circuit between immobilizer unit and clock spring.