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May 23, 2014 Service bulletin

Tech Tip: Greenhouse Gas Logic (GHG) has been implemented on Toyota A/C Systems to reduce tailpipe emissions

Lexus technical service bulletin L-TT-0158-14 for 2013-2014 Lexus ES350, 2013-2015 Lexus RX350 and 2014-2015 Lexus IS 250 and others.

Bulletin number
L-TT-0158-14
Component
Equipment: appliance: air conditioner
Summary
Tech Tip: Greenhouse Gas Logic (GHG) has been implemented on Toyota A/C Systems to reduce tailpipe emissions. The Federal government issues CAFÉ (Corporate Average Fuel Economy) credits to vehicle manufacturers that implement new technologies that reduce the carbon footprint of the vehicles they produce. GHG Logic technology works by automatically operating the HVAC system in REC mode when certain conditions are met, improving the A/C system cooling efficiency and reducing the vehicle's CO2 tailpipe emissions.

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