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-   -   fuel pump? (https://www.chevyhhr.net/forums/problems-service-repairs-42/fuel-pump-62529/)

Supafly94 Dec 2, 2019 05:46 PM

fuel pump?
 
Hello I have a 09 ss Im having an issue with. When I get under 1/2 tank I get kind of a power surging issue which kicks on engine reduced power, service esc and service traction. I was thinking it might be the fuel pump but there is a P0121 in stored codes but engine light is not on. Any body here had this issue before, Thanks!

Oldblue Dec 2, 2019 05:59 PM

The P0121 code directs you to the most likely cause , read in

https://www.obd-codes.com/p0121

donbrew Dec 2, 2019 08:32 PM

Stored as in "history" or "pending".
Could it be more like hard shifting?
most likely is you need a new accelerator pedal. Possibly a buggered wire on the accel pedal or .MAF.


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