P0305: How to Diagnose & Fix — Cylinder 5 Misfire Detected
74 vehicles · 22 makes · $60-$28,000 repair
How to diagnose and fix P0305: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Hyundai Tucson · 2014–2019
The Theta II GDI engine in 2014-2015 and 2018-2019 Tucson models is susceptible to connecting rod bearing failure caused by manufacturing debris restricting oil flow. This can lead to catastrophic engine seizure, often without warning. Under the Theta II engine class-action settlement, Hyundai extended the powertrain warranty to a Lifetime Warranty (Warranty Extension TXXI) for connecting rod bearing damage on vehicles that complete the Knock Sensor Detection System software update (Service Campaign 953).
Common Symptoms
- Metallic knocking from engine
- Engine stalling without warning
- Check engine light with P1326 code
- Loss of power while driving
- Excessive oil consumption
How to Fix
Check VIN for active recalls at NHTSA.gov. Ensure the Knock Sensor Detection System (KSDS) software update has been installed - this monitors for early signs of bearing failure and can put the engine in limp mode. If the engine has failed from connecting rod bearing damage after the KSDS update, Hyundai covers the short-block repair under the lifetime warranty extension. Out-of-warranty replacement runs $4,500-7,500. Use full synthetic 0W-20 oil and change every 5,000 miles.
Owner tips & cautions
- TipGet the KSDS software update immediately if not already done - it can detect bearing failure early and prevent catastrophic seizure
- WarningIf you hear any knocking noise, stop driving immediately. Continued driving can destroy the engine beyond repair
Sources for this issue (1)
Chrysler 300 · 2011–2023
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.
Common Symptoms
- Persistent ticking or tapping noise from engine
- Ticking worsens between 80,000-100,000 miles
- Check engine light with misfire codes
- Rough idle or loss of power
- Metal shavings in oil
How to Fix
Replace all lifters, camshaft, and rocker arms as assembly. Use only OEM or high-quality lifters. Some owners disable MDS system. Use only SAE 5W-20 oil and maintain strict 3,000-5,000 mile oil change intervals.
Sources for this issue (1)
Volkswagen Beetle · 2006–2019
The VW Beetle is notorious for premature ignition coil pack failures across both the 2.5L 5-cylinder and 2.0T engines. Coil packs crack internally, causing misfires, rough running, and check engine lights. VW's OEM coils often fail between 40,000-80,000 miles. Driving with a failed coil can damage the catalytic converter.
Common Symptoms
- Engine misfires (flashing check engine light)
- Rough idle and vibration
- Loss of power
- Check engine light with codes P0300-P0305
- Poor fuel economy
- Hesitation during acceleration
How to Fix
Replace all ignition coil packs at once (do not replace just the failed one - the others will follow). Use quality aftermarket coils (Bosch, Eldor, or OEM). Replace spark plugs at the same time (NGK or Bosch Platinum). For the 2.5L: 5 coils needed (VW part# 07K-905-715-F). For the 2.0T: 4 coils needed (VW part# 06H-905-110-P). This is a DIY-friendly job (30-60 minutes).
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Bosch 07K905715F ignition coil
replace a coil proven faulty by cylinder-specific diagnosis; five are used on the 2.5L but a full set is not mandatory without evidence Fitment/availability: Volkswagen 2.5L five-cylinder coil branch including New Beetle; confirm A5 Beet…
- Genuine Volkswagen 06H905110P ignition coil
replace a confirmed failed turbo-engine coil after misfire isolation; four are used on an inline-four Fitment/availability: Beetle turbo gasoline branch using VW 06H 905 110 P; confirm engine code and VIN because the record spans multipl…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (1)
RAM 1500 · 2009–2019
Volkswagen Rabbit · 2006–2009
Find P0305 by make
Browse every documented model and issue for your make.
P0305 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0305 mean?
P0305 stands for "Cylinder 5 Misfire Detected." This code means the engine control module detected a misfire on cylinder number 5, meaning that cylinder is not burning its air-fuel mixture properly on some combustion cycles. The computer senses misfires by watching for tiny fluctuations in crankshaft speed each time a cylinder fails to fire correctly. A misfire wastes fuel, can make the engine run rough or shake, and dumps unburned fuel into the exhaust, which can overheat and damage the catalytic converter. It generally points to a problem with spark, fuel delivery, or compression specifically affecting cylinder 5.
What are the most common causes of P0305?
The most common causes of P0305 are: Worn or fouled spark plug on cylinder 5, Failed ignition coil or coil pack for cylinder 5, Faulty or clogged fuel injector on cylinder 5, Vacuum or intake air leak affecting that cylinder, Bad spark plug wire or boot (on applicable engines), Low compression from worn rings, valves, or head gasket, Carbon buildup or sticking valve on cylinder 5, Lean or rich fuel condition affecting the cylinder. The specific cause varies by vehicle.
How much does it cost to fix P0305?
Repair costs for P0305 range from $60 to $28,000, depending on the vehicle and root cause.
Which vehicles are affected by P0305?
Au7o has documented P0305 across 74 vehicle models from 22 manufacturers: Acura, Audi, BMW, Cadillac, Chevrolet, Chrysler, Dodge, Ford, Honda, Hyundai, Infiniti, Jaguar, Jeep, Lexus, Lincoln, Mazda, Nissan, Porsche, RAM, Saturn, Subaru, Volkswagen.
Join 600+ people using Au7o to better understand their vehicles.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.