1997 Chevy Tahoe understanding car codes

Tiny
JENKINSON
  • MEMBER
  • 1997 CHEVROLET TAHOE
1997 Chevy Tahoe V8 Four Wheel Drive Manual

what do the codes P0102 MAF and P0303 Cyl 3 Misfire mean
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Wednesday, November 12th, 2008 AT 7:08 PM

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Tiny
RASMATAZ
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A code P0102 may mean that one or more of the following has happened:

The MAF may be disconnected, or a wiring connection may be bad
The MAF may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF).
The MAF sensor may be faulty
The vehicle computer may be faulty (very rare)
Possible SolutionsThe simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:

Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires.
Inspect for any air leaks near the MAF sensor.
Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor.
Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
Replace the MAF sensor.

P0303 misfiring at cylinder no.3

Check sparkplug, compression and injector for no.3 cylinder

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel
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Thursday, November 13th, 2008 AT 7:00 AM

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