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P1602 Mazda Code - Engine Control Module Immobilizer Error

- Code Popularity: 9,529 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1602 Mazda?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Immobilizer word code not programmed
  • Faulty Engine Control Module (ECM)
  • Engine Control Module (ECM) harness is open or shorted
  • Engine Control Module (ECM) circuit poor electrical connection
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How to Fix the DTC P1602 Mazda?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1602 Mazda code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1602 Mazda Description

Battery positive voltage is supplied to the Engine Control Module (ECM) even when the ignition switch is OFF for use by the Diagnostic Trouble Code (DTC) memory and air–fuel ratio adaptive control value memory, etc.

OBDII Code P1602 Mazda - Engine Control Module Immobilizer Error - AutoCodes.com
P1602 Mazda Code - Engine Control Module Immobilizer Error

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Code P1602 Mazda comments

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