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AutoCodes - Generic - C1805

C1805 Code - Mismatched PCM and/or ABS Module

- Code Popularity: 27,378 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C1805?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Reprogram Powertrain Control Module (PCM) ("Flashing")
  • Faulty Anti-Lock Brake System (ABS) Module
  • Anti-Lock Brake System (ABS) Module harness is open or shorted
  • Anti-Lock Brake System (ABS) Module circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC C1805?

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 C1805 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?

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

Code C1805 Description

When the ignition is turned to the RUN position, the Anti-Lock Brake System (ABS) Module and the Powertrain Control Module (PCM) share Vehicle Identification Number (VIN) information over the High Speed Controller Area Network (HS-CAN) bus. If the VIN information stored in the ABS module does not match the information transmitted by the PCM, DTC C1805 will set.

OBDII Code C1805 - Mismatched PCM and/or ABS Module - AutoCodes.com
C1805 Code - Mismatched PCM and/or ABS Module

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Code C1805 comments

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