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2003 Chevy Malibu DTC 172 code

Tiny
160DB1999MUSTANG
  • MEMBER
  • 2003 CHEVROLET MALIBU
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
ENGINE HAD A 171 TO LEAN CODE USED FUEL INJ. CLEANER NOW HAS A 172 RICH CODE SHOULD I TRY FUEL INJ. CLEAN OR WHATELSE?
Tuesday, March 30th, 2010 AT 6:37 PM

2 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
If you have a rich code now after you put injector cleaner in, I would check the fuel pressure regulator, also check the engine coolant temp sensor.
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Tuesday, March 30th, 2010 AT 9:41 PM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm
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Tuesday, March 30th, 2010 AT 9:42 PM

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