trifecta
Deceased
Joined: 06-30-2010
Posts: 25,739
From: Kannapolis NC
9 times out of 10, our old friend the P0121 OBD II Code indicates a throttle body in need of a cleaning.
Give this thread a read, and remember, HHR throttle bodies are fragile devils which will punish any cleaning attempts that are too agressive.
https://www.chevyhhr.net/forums/main...leaning-48936/
Give this thread a read, and remember, HHR throttle bodies are fragile devils which will punish any cleaning attempts that are too agressive.
https://www.chevyhhr.net/forums/main...leaning-48936/
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TomsHHR
2.0L Performance Tech
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May 4, 2009 06:55 PM