P0308 on Chrysler
Cylinder 8 Misfire Detected
P0308 on Chrysler vehicles indicates cylinder 8 misfire detected. Au7o has documented this code across 2 Chrysler models — most commonly on 300, Aspen. P0308 means the engine computer detected a misfire on cylinder number 8 — that cylinder is failing to combust properly or at the correct time. The PCM identifies it by monitoring crankshaft speed variations as cylinder 8 fires. Misfires waste fuel, increase emissions, and can overheat and damage the catalytic converter, so a hard misfire may cause a flashing check engine light. Typical symptoms include rough idle, vibration, hesitation, and reduced power. Typical repair costs on Chrysler range from $2,000 to $6,000, depending on the specific model and root cause.
Common Causes of P0308
- •Worn, fouled, or incorrectly gapped spark plug on cylinder 8
- •Failed ignition coil or coil-on-plug for cylinder 8
- •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
P0308 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 P0308 across all makes →Frequently Asked Questions
What does P0308 mean on Chrysler?▼
P0308 stands for "Cylinder 8 Misfire Detected." P0308 means the engine computer detected a misfire on cylinder number 8 — that cylinder is failing to combust properly or at the correct time. The PCM identifies it by monitoring crankshaft speed variations as cylinder 8 fires. Misfires waste fuel, increase emissions, and can overheat and damage the catalytic converter, so a hard misfire may cause a flashing check engine light. Typical symptoms include rough idle, vibration, hesitation, and reduced power. On Chrysler specifically, this code is documented across 2 models.
What causes P0308 on Chrysler vehicles?▼
Common causes on Chrysler: Worn, fouled, or incorrectly gapped spark plug on cylinder 8, Failed ignition coil or coil-on-plug for cylinder 8, 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 P0308 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 P0308 documented?▼
Au7o has documented P0308 on 2 Chrysler models: 300, Aspen.