ENGINE STARTED RUNNING ROUGHSTALLING GOT A ...

  • Tiny
  • rogerballesteros
  • 2003 GMC Sierra
  • 185,000 miles

Engine started running rough/stalling, got a diagnostic code of MAF, and then thermostat/sensor, and the O2 sensor bank 1.I replaced all 3 of these items but engine is still running rough.

Tuesday, January 1st, 2013 AT 10:34 PM

2 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,550 posts

What were the codes?

Codes never identify bad parts, just failed systems.

Lets start with the code numbers

Roy

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Tuesday, January 1st, 2013 AT 10:40 PM
  • Tiny
  • rogerballesteros
  • Member

This is how the codes came up.

P0128- Coolant Temp below Thermostat
P0101- mass air flow range
P0420- below threshold- bank 1

replaced
MAF
Distributor
O2 Sensor bank 1
thermostat/sensor

cleared codes- engine stalled again while idling

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Thursday, January 3rd, 2013 AT 4:26 AM

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