P0307 on Chrysler
Cylinder 7 Misfire Detected
P0307 on Chrysler vehicles indicates cylinder 7 misfire detected. Au7o has documented this code across 2 Chrysler models — most commonly on 300, Aspen. P0307 means the engine computer detected a misfire on cylinder number 7 — that cylinder isn't burning its air/fuel mixture completely or at the right moment. The PCM senses this by watching for tiny slowdowns in crankshaft speed each time cylinder 7 should fire. A misfire wastes fuel, can dump raw fuel into the exhaust, and may damage the catalytic converter over time, which is why a persistent or severe misfire often makes the check engine light flash. You may feel rough idle, shaking, hesitation, or a loss of power. Typical repair costs on Chrysler range from $2,000 to $6,000, depending on the specific model and root cause.
Common Causes of P0307
- •Worn, fouled, or incorrectly gapped spark plug on cylinder 7
- •Failed ignition coil or coil-on-plug for cylinder 7
- •Faulty, clogged, or leaking fuel injector
- •Vacuum or intake air leak affecting that cylinder
- •Low compression (worn rings, burnt/leaking valve, head gasket)
- •Damaged spark plug wire or boot (on applicable engines)
- •Carbon buildup or sticking valve
P0307 on Chrysler by Model
Chrysler 300(1 issue)
- 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.
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.
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View P0307 across all makes →Frequently Asked Questions
What does P0307 mean on Chrysler?▼
P0307 stands for "Cylinder 7 Misfire Detected." P0307 means the engine computer detected a misfire on cylinder number 7 — that cylinder isn't burning its air/fuel mixture completely or at the right moment. The PCM senses this by watching for tiny slowdowns in crankshaft speed each time cylinder 7 should fire. A misfire wastes fuel, can dump raw fuel into the exhaust, and may damage the catalytic converter over time, which is why a persistent or severe misfire often makes the check engine light flash. You may feel rough idle, shaking, hesitation, or a loss of power. On Chrysler specifically, this code is documented across 2 models.
What causes P0307 on Chrysler vehicles?▼
Common causes on Chrysler: Worn, fouled, or incorrectly gapped spark plug on cylinder 7, Failed ignition coil or coil-on-plug for cylinder 7, Faulty, clogged, or leaking fuel injector, Vacuum or intake air leak affecting that cylinder, Low compression (worn rings, burnt/leaking valve, head gasket). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0307 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 P0307 documented?▼
Au7o has documented P0307 on 2 Chrysler models: 300, Aspen.