Problem With HP E47 tune
#2
Have you looked up the code? ie: P0557 Brake Booster Pressure Sensor Circuit Low Voltage OBDII Engine Light Trouble Code | Engine-Codes.com
#4
Using the SEARCH tool at the top of the page showed only 1 thread discussing the p0557 code - and traced it back to a bad connection - https://www.chevyhhr.net/forums/hhr-...-20946/page14/
But it is a thread from way back in 2009.
But it is a thread from way back in 2009.
#10