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AutoCodes - Generic - U1020

U1020 Code - Invalid Or Missing Data For Air Conditioning Clutch Control

- Code Popularity: 6,493 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U1020?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Air Conditioning Clutch Control
  • Air Conditioning Clutch Control harness is open or shorted
  • Air Conditioning Clutch Control circuit poor electrical connection
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How to Fix the DTC U1020?

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 U1020 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 U1020 Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication from Air Conditioning Clutch Control, Diagnostic Trouble Code (DTC) is set.

OBDII Code U1020 - Invalid Or Missing Data For Air Conditioning Clutch Control - AutoCodes.com
U1020 Code - Invalid Or Missing Data For Air Conditioning Clutch Control

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Code U1020 comments

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