2000 GMC Jimmy - Suddenly not running right

[Vorkosigan]

I've got a 2000 GMC Jimmy that all of a sudden started not running right. Loss of power, idle is too slow, it's running really rough(can shake the whole vehicle), and won't stay running if I stop for too long.

The Service Engine Soon light came on and the error codes are as follows:

P0300 - Random/Multiple Cylinder Misfire Detected
P0147 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 3)
P0155 - O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

I could use some help figuring out what's wrong. Otherwise who knows how long it will be before I can get a mechanic to even look at it. If it's something simple, however, I could probably fix it myself.

[MT-2500]

Originally Posted by Vorkosigan

I've got a 2000 GMC Jimmy that all of a sudden started not running right. Loss of power, idle is too slow, it's running really rough(can shake the whole vehicle), and won't stay running if I stop for too long.

The Service Engine Soon light came on and the error codes are as follows:

P0300 - Random/Multiple Cylinder Misfire Detected
P0147 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 3)
P0155 - O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

I could use some help figuring out what's wrong. Otherwise who knows how long it will be before I can get a mechanic to even look at it. If it's something simple, however, I could probably fix it myself.

With a missfire code
Check your secandary ign.
Start with plugs and check wires and cap.
Check for good hot spark to all plugs.
Make sure you have proper fuel pressure.
Clear codes and see what comes back.
Let us know how it goes.

[Vorkosigan]

Thanks for the help, but it was not a problem I could deal with on my own.

Luckily it seems I found a decent shop (I'll see if I still feel that way over time) and they were able to get it in right away. Looks like one of the fuel injectors failed.

[MT-2500]

Originally Posted by Vorkosigan

Thanks for the help, but it was not a problem I could deal with on my own.

Luckily it seems I found a decent shop (I'll see if I still feel that way over time) and they were able to get it in right away. Looks like one of the fuel injectors failed.

You are welcome.
Thanks for posting back how it went and what they found.
Good luck