2001 GMC Safari Van


Asked by Dec 29, 2015 at 04:12 PM about the 2001 GMC Safari

Question type: Maintenance & Repair

Where is OBD Bulb located? PO102 Mass
Air Flow Sensor low circuit how to fix?
PO404 EGR A Control Circuit Range how
to fix? What would cause OBD11
monitors not ready?

1 Answer


The P0102 is most likely the wiring going to the Mass Airflow Sensor. Sounds like you have a bad connection. If you have an aftermarket air filter, such as a K&N the oil for the air filter will contaminate the MAF. Or the MAF may be bad. The P0404 code is a pain in the neck one. Try this, in this order unplug the EGR valve, clear the computer with a scan tool. Turn off the ignition and disconnect the scan tool. Now plug the EGR valve back in and start the engine. This will allow the computer to learn the closed position of the EGR valve. Unfortunately if this doesn't work you'll have to get the computer flashed (reprogrammed). Yes, these things will prevent the readiness monitors from setting. You'll also need to drive a few days with the gas tank between 3/4 and 1/4 full to set the readiness monitors. You can pass inspection with 1, but only 1, readiness monitors not set under Federal Law. I literally just took my '00 Pontiac Grand Prix through inspection yesterday under the same condition. I repaired a misfire code and cleared the computer. Then drove the car for about 2 hours. All the readiness monitors had reset except for the EVAP System and I passed inspection. HTH. -Jim

Your Answer

Add photo

Related Questions

Search GMC Safari Questions

GMC Safari Experts

#1 Deathjam4
Reputation 200
#2 dandyoun
Reputation 80
#2 FordNut
Reputation 80
View All

Related Models For Sale

Used Chevrolet Astro"
343 listings starting at $2,695
Used GMC Savana"
4 Great Deals out of 1,538 listings starting at $2,995
Used Chevrolet Astro Cargo Van"
202 listings starting at $3,777
Used Chevrolet Express"
144 Great Deals out of 6,541 listings starting at $2,495
Used GMC Sierra 1500"
1,028 Great Deals out of 56,923 listings starting at $2,300
Used GMC Safari Cargo"
40 listings starting at $3,900
Used GMC Savana Cargo"
62 Great Deals out of 4,718 listings starting at $3,499
Used Chevrolet Express Cargo"
86 Great Deals out of 12,594 listings starting at $2,000
Used Ford Explorer"
1,363 Great Deals out of 71,754 listings starting at $300
Used Chevrolet Tahoe"
1,076 Great Deals out of 36,075 listings starting at $1,700
Used GMC Yukon"
563 Great Deals out of 19,457 listings starting at $2,500
Used Chrysler Town & Country"
811 Great Deals out of 21,939 listings starting at $1,787
Used Toyota Sienna"
359 Great Deals out of 26,149 listings starting at $600
Used Ford E-Series Cargo"
113 Great Deals out of 3,646 listings starting at $1,495
Used Honda Odyssey"
407 Great Deals out of 26,653 listings starting at $500

Used Cars For Sale

2005 GMC Safari For Sale
6 listings starting at $3,995
2002 GMC Safari For Sale
12 listings starting at $4,995
2000 GMC Safari For Sale
23 listings starting at $1,600