P0306 on Chrysler
Cylinder 6 Misfire Detected
P0306 on Chrysler vehicles indicates cylinder 6 misfire detected. Au7o has documented this code across 2 Chrysler models — most commonly on 300, Aspen. This code means the engine computer detected a misfire on cylinder 6 — that cylinder isn't burning its fuel-air mixture properly. The computer senses misfires by watching for tiny variations in crankshaft speed each time a cylinder should fire, and when cylinder 6 repeatedly fails to contribute, this code sets. You may feel a shake or stumble, especially at idle or under load, along with reduced power and possibly a flashing check-engine light, which signals a misfire severe enough to damage the catalytic converter. A misfire comes down to a problem with spark, fuel, or compression in that cylinder. Typical repair costs on Chrysler range from $2,000 to $6,000, depending on the specific model and root cause.
Common Causes of P0306
- •Worn or fouled spark plug on cylinder 6
- •Failed ignition coil for cylinder 6
- •Clogged, leaking, or failed fuel injector
- •Vacuum or intake air leak affecting that cylinder
- •Low compression (worn rings, burnt valve, head gasket)
- •Damaged plug wire or coil connector
- •Carbon buildup or worn valvetrain components
P0306 on Chrysler by Model
Chrysler 300(2 issues)
- HEMI 5.7L MDS Lifter and Camshaft Failure2011-2023
The 5.7L HEMI V8 suffers from MDS lifter design defect where needle bearings are undersized. Lifters can be starved of oil during idle, causing seizure and catastrophic camshaft wear leading to engine failure.
- Pentastar Cylinder Head Failure2011-2016
Left cylinder head on early Pentastar engines suffers valve seat failure in cylinder #2. Valve seats overheat and drop out of aluminum head causing catastrophic misfires and potential engine damage. Design flaw later addressed.
Chrysler Aspen(1 issue)
- 5.7L HEMI MDS Lifter Tick and Camshaft Failure2007-2009
Same HEMI 5.7L lifter/camshaft failure issue affecting all MDS-equipped engines. The MDS lifters have undersized needle bearings that fail from oil starvation at idle, causing catastrophic camshaft wear. Persistent ticking that worsens over time indicates lifter failure in progress.
Looking for P0306 on a different make?
View P0306 across all makes →Frequently Asked Questions
What does P0306 mean on Chrysler?▼
P0306 stands for "Cylinder 6 Misfire Detected." This code means the engine computer detected a misfire on cylinder 6 — that cylinder isn't burning its fuel-air mixture properly. The computer senses misfires by watching for tiny variations in crankshaft speed each time a cylinder should fire, and when cylinder 6 repeatedly fails to contribute, this code sets. You may feel a shake or stumble, especially at idle or under load, along with reduced power and possibly a flashing check-engine light, which signals a misfire severe enough to damage the catalytic converter. A misfire comes down to a problem with spark, fuel, or compression in that cylinder. On Chrysler specifically, this code is documented across 2 models.
What causes P0306 on Chrysler vehicles?▼
Common causes on Chrysler: Worn or fouled spark plug on cylinder 6, Failed ignition coil for cylinder 6, Clogged, leaking, or failed fuel injector, Vacuum or intake air leak affecting that cylinder, Low compression (worn rings, burnt valve, head gasket). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0306 on a Chrysler?▼
Repair costs on Chrysler range from $2,000 to $6,000, depending on the specific model and root cause.
Which Chrysler models have P0306 documented?▼
Au7o has documented P0306 on 2 Chrysler models: 300, Aspen.