P1803 - Immobilizer ECU Signal Error

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

  • Faulty Immobilizer ECU
  • Immobilizer ECU harness is open or shorted
  • Immobilizer ECU circuit poor electrical connection

Possible symptoms

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

P1803 Description

Immobilizer ECU Signal Error is the generic description for the P1803 code, but the manufacturer may have a different description. Currently we have no further information abouth the P1803 OBDII code. Please post your question on our "Questions" section for more information: AutoCodes.com Questions.
OBDII Code P1803 - Immobilizer ECU Signal Error - AutoCodes.com

P1803 Information for specific makes

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P1803 Comments

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