U0074 - Control Module Communication Bus B Off - DTC Chart
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U0074 - CONTROL MODULE COMMUNICATION BUS B OFF - DTC CHART
| Description: This DTC sets when the controller area network 2 (CAN2) between the PCM and glow plug control module (GPCM) is open. |
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Possible Causes:
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| Diagnostic Aids: The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center. Network DTC concerns occur during module-to-module communication. For additional description and operation of the vehicle communication network, refer to the service information , Module Communications Network. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test AF . | ||