P1603 KIA - CAN Communication Bus Error

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P1603 KIA Possible Causes

  • Faulty Transaxle Control Module(TCM) or Engine Control Module(ECM)
  • Transaxle Control Module(TCM) to Engine Control Module(ECM) harness is open or shorted
  • Transaxle Control Module(TCM) to Engine Control Module(ECM) circuit poor electrical connection

How do I fix code P1603 KIA

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1603 KIA code

    Labor: 1.0

    The cost of diagnosing the P1603 KIA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1603 KIA Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1603 KIA Meaning

A communication line exists between the Engine Control Module(ECM) and the Transaxle Control Module(TCM). The communication is through a Control Area Network(CAN). Without CAN communication, an independent pin and wiring is needed to receive a sensor information from a ECM. The more information to be communicated, the more wirings is required. In case of CAN communication type, all the information need to be communicated among control modules such as ECM and TCM use CAN lines.
OBDII Code P1603 KIA - CAN Communication Bus Error - Engine-Codes.com

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