U1178 - Invalid or Missing Data For Climate Control

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

  • Faulty Heating, Ventilation, and Air-Conditioning (HVAC) Module
  • Heating, Ventilation, and Air-Conditioning (HVAC) Module harness is open or shorted
  • Heating, Ventilation, and Air-Conditioning (HVAC) Module circuit poor electrical connection

Possible symptoms

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

U1178 Description

The Powertrain Control Module (PCM) monitors the Heating, Ventilation, and Air-Conditioning (HVAC) Module. The PCM sets the OBDII code when the Heating, Ventilation, and Air-Conditioning (HVAC) Module is not to factory specifications.
OBDII Code U1178 - Invalid or Missing Data For Climate Control - AutoCodes.com

U1178 Information for specific makes

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U1178 Comments

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