What does code P0301 mean on a Pontiac and is it safe to drive?
P0301: Cylinder 1 Misfire Detected. Here's what it means on your Pontiac, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
The PCM has detected a misfire specifically on cylinder 1. Similar to P0300, but pinned to a single cylinder.
Common causes for your Pontiac
- Worn or fouled spark plug on cylinder 1
- Failing ignition coil or coil-on-plug
- Leaking or clogged fuel injector
- Low compression in cylinder 1
Symptoms
- Check Engine Light (often flashing when misfire is severe)
- Rough idle or shaking, especially at low RPM
- Loss of power under load
Typical fixes
- Replace spark plug and/or coil on cylinder 1
- Test and clean or replace the injector
- Perform compression test and repair internal issues if needed
Repair cost range
For a Pontiac, repairs for P0301 often fall between $150 and $900, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Pontiac
Pontiac G6 3.5L/3.9L V6 P0301 is typically a failed coil-on-plug on cylinder 1. On the G8 with the LS2/LS3 V8, P0301 is uncommon—these are extremely robust engines. On the Solstice GXP 2.0T, carbon buildup on intake valves from direct injection can cause misfires.
Most commonly affected models
G6 3.5L/3.9L V6 2006–2010G8 6.0L LS2/LS3 V8 2008–2009Solstice 2.4L Ecotec 2006–2010