Intermittent Transmission Hard Shift
#1
CF Beginner
Thread Starter
Join Date: Jun 2015
Location: Arizona
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Intermittent Transmission Hard Shift
I own a 2009 Cobalt sedan. If I let the car idle for longer than a minute or two the engine will set a P0308 DTC (Injector #1 misfire) and the transmission will shift extremely hard. In this situation, I usually will shut the car off, let it set for 30 seconds and restart and drive before I let it idle very long. Also, I've noticed a severe engine miss will occur if I'm stopped at a traffic light for very long - as soon as I pull away, the issue usually will go away. I've inspected the harness, replaced all four spark plugs and installed a new coil at #1 cylinder. The issue remains - however it is intermittent. I can go two weeks without a DTC being set, then I'll have 5-6 days where it's constantly an issue. I've had the ignition recall done (I was promised a gift certificate from GM - which they never sent me....) I spoke with the service manager and he wanted to charge me $120 to pull the code and diagnose for one hour. I respectfully declined his offer - $120 is a lot of money for Cobalt owners.... Any suggestions?
#2
Cobalt missing out,
I own a 2009 Cobalt sedan. If I let the car idle for longer than a minute or two the engine will set a P0308 DTC (Injector #1 misfire) and the transmission will shift extremely hard. In this situation, I usually will shut the car off, let it set for 30 seconds and restart and drive before I let it idle very long. Also, I've noticed a severe engine miss will occur if I'm stopped at a traffic light for very long - as soon as I pull away, the issue usually will go away. I've inspected the harness, replaced all four spark plugs and installed a new coil at #1 cylinder. The issue remains - however it is intermittent. I can go two weeks without a DTC being set, then I'll have 5-6 days where it's constantly an issue. I've had the ignition recall done (I was promised a gift certificate from GM - which they never sent me....) I spoke with the service manager and he wanted to charge me $120 to pull the code and diagnose for one hour. I respectfully declined his offer - $120 is a lot of money for Cobalt owners.... Any suggestions?
Thread
Thread Starter
Forum
Replies
Last Post
warthogcrewchief
Tahoe & Suburban
22
September 24th, 2022 4:37 PM
mkmaha
General Tech
0
June 12th, 2008 2:25 PM