C0550 - Electronic Control Unit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Transfer Case Shift Control Module (TCCM)
  • Transfer Case Shift Control Module (TCCM) harness is open or shorted
  • Transfer Case Shift Control Module (TCCM) circuit poor electrical connection

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C0550 Description

This is an internal fault detection of the Transfer Case Shift Control Module (TCCM). This fault is handled inside the TCCM. No external circuits are involved.

At each power-up, the TCCM runs a self-test on the following:

- EEPROM Checksum

- ROM Checksum

- RAM Checksum

- RAM Malfunction

OBDII Code C0550 - Electronic Control Unit - AutoCodes.com

C0550 Information for specific makes

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C0550 Comments

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