Question about 2003 Chevrolet TrailBlazer
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Posted on Jan 02, 2017
SOURCE: service engine light
Code P0102 indicates MAF(Mass Air Flow) sensor circuit, low frequency detected
Code P0300 indicates Random Cylider miss fire, meaning missfire in more than one cylinder
The misfire could be a result of the mas air flow sensor being faulty.
Hope this helps for now
Let me know what size motor and if it's 2wd or 4wd and I can get detailed instructions for replacing
Posted on Jul 05, 2008
That is an EVAP code. its a vent control code. you can manually test it by powering it up if you know where its at. i cant remember exaclty where its at off the top of my head but its only 2 wires. using a volt meter you want to make sure power is getting to it, but you cannot activate it without dealer scan tool.hmmm if you can figure out which is ground and power when you give it 12 volts it should click. meaning your vent solenoid works and you have wiring problems or its leaking.
EVAP problems are hard to finde with out scanners. you can change the vent solenoid and hope it fixes it. but a code points you to the direction of a problem. hopefull its not wiring problems. in the northern states with snow. ice can pull out wires and also get clogged in the vent solenoid and lock it up. its either wiring or bad or a leaking solenoid. check condition of wires. if they look good try a vent soleniod.
if that doesnt fix it after a engine light reset and 2 weeks or so. then goto dealer. you need to reset it after repair. light will not go off on its own.GOOD LUCK
Posted on Feb 09, 2009
You can't jump the connector to get codes on OBD II. (Pre 1996) Try hooking back up you code reader. If it doesn't communicate, check the fuse for the cig lighter. This fuse should also power up the diagnostic plug.
Posted on Mar 09, 2009
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