Rick's Free Auto Repair Advice

Cobalt P0102

Cobalt P0102 trouble code

GM has issued a service bulletin PIC3410C to address a Cobalt P0102 on this vehicle and other GM vehicles listed below. Service bulletin PIC3410C isn’t limited to just a Cobalt P0102 issue. Other codes like P043,3 P0036, P0030, P0135, and P0101 may also be present.

MAF wiring diagram

MAF wiring diagram

Start by checking for a blown EXH fuse in the underhood fuse box. If the fuse is blown, check for a chaffed wire harness rub through near the bracket holding purge solenoid. That’s a common rub through spot. If you discover chaffing, repair the short-to-ground condition and replace the fuse.

Next, if the vehicle has a manual transmission, check for a short-to-ground wire chaffing condition near the clutch pedal position switch. The bulletin suggests the harness may chaffe on the clutch bracket. If it’s chaffed, repair and then check and replace the emissions fuse in the underhood fuse box.

Then check for wiring harness chaffing at the oil filter adapter housing. This would be a short-to-ground condition. If you find chaffing, repair it.

Check oxygen sensor wiring

Check is a chaffed oxygen sensor wiring.

Check MAF sensor wiring harness

check the MAF sensor wiring harness for chaffing, open, short-to-ground. Also check the MAF connector for terminal corrosion or pins pushed out of place

Vehicles affected by service bulletin PIC3410C

2005-07 Chevrolet Cobalt
2005-06 Pontiac Pursuit
2007 Pontiac G5

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Posted on by Rick Muscoplat

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