P0305 Code - Cylinder 5 Misfire Detected
Quick Answer
The Engine Control Module (ECM) uses information from the crankshaft position sensor and the camshaft position sensor to determine when an engine cylinder misfire is occurring. Common causes include Faulty spark plug 5, Clogged or faulty fuel injector 5, Faulty ignition coil 5. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0305 indicates Cylinder 5 Misfire Detected.
- Common causes
- Common causes include Faulty spark plug 5, Clogged or faulty fuel injector 5, Faulty ignition coil 5.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0305 Description
Extreme cylinder misfire events can cause catalytic converter damage. The malfunction indicator lamp (MIL) will flash when the conditions for catalytic converter damage are present. The Diagnostic Trouble Codes (DTC) P0305 correspond to cylinders 5. When the ECM detects that one or more specific cylinders are misfiring, the DTC for the respective misfiring cylinder will set, and up to 2 of the corresponding fuel injectors are disabled for a minimum of 30 s. The ECM will then re-enable the fuel injector and, after approximately 200 engine revolutions, will determine if the misfire is still present. If the misfire is still present, the ECM will disable the fuel injector again repeating the process. If the misfire is not present, the fuel injector will remain enabled by the ECM. In Spark Ignition Direct Injection (SIDI) system applications, if a fuel injector fault DTC is set during a misfire event, the ECM will not re-enable the injector.
What are the Possible Causes of the DTC P0305?
- Faulty spark plug 5
- Clogged or faulty fuel injector 5
- Faulty ignition coil 5
- Fuel injector 5 harness is open or shorted
- Fuel injector 5 circuit poor electrical connection
- Ignition coil 5 harness is open or shorted
- Ignition coil 5 circuit poor electrical connection
- Insufficient cylinder 5 compression
- Incorrect fuel pressure
- Intake air leak
How to Fix the DTC P0305?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0305 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0305 Acura — No. 5 Cylinder Misfire Detected
- P0305 Audi — Cylinder 5 Misfire Detected
- P0305 BMW — Misfire Cylinder 5
- P0305 Buick — Cylinder 5 Misfire Detected
- P0305 Cadillac — Cylinder 5 Misfire Detected
- P0305 Chevrolet — Cylinder 5 Misfire Detected
- P0305 Chrysler — Cylinder Misfire Fault Detected
- P0305 Dodge — Cylinder Misfire Fault Detected
- P0305 Ford — Cylinder 5 Misfire Detected
- P0305 GMC — Cylinder 5 Misfire Detected
- P0305 Honda — No. 5 Cylinder Misfire Detected
- P0305 Hummer — Cylinder 5 Misfire Detected
- P0305 Hyundai — Cylinder 5 Misfire Detected
- P0305 Infiniti — Number 5 Cylinder Misfire Detected
- P0305 Isuzu — Cylinder Number 5 Misfire Detected
- P0305 Jaguar — Cylinder 5 Misfire Detected
- P0305 Jeep — Cylinder Misfire Fault Detected
- P0305 KIA — Cylinder 5 Misfire Detected
- P0305 Land Rover — Cylinder 5 Misfire Detected
- P0305 Lexus — Cylinder 5 Misfire Detected
- P0305 Lincoln — Cylinder 5 Misfire Detected
- P0305 Mazda — Cylinder 5 Misfire Condition Detected
- P0305 Mercedes-Benz — Cylinder 5 Misfire Detected
- P0305 Mercury — Cylinder 5 Misfire Detected
- P0305 MINI — Misfire Cylinder 5
- P0305 Mitsubishi — Cylinder 5 Misfire Condition
- P0305 Nissan — Number 5 Cylinder Misfire Detected
- P0305 Oldsmobile — Cylinder 5 Misfire Detected
- P0305 Pontiac — Cylinder 5 Misfire Detected
- P0305 RAM — Cylinder Misfire Fault Detected
- P0305 Saab — Cylinder 5 Misfire Detected
- P0305 Saturn — Cylinder 5 Misfire Detected
- P0305 Subaru — Cylinder 5 Misfire Detected
- P0305 Toyota — Cylinder 5 Misfire Detected
- P0305 Volkswagen — Cylinder 5 Misfire Detected
- P0305 Volvo — Cylinder 5 Misfire Detected
Frequently Asked Questions about P0305 Code
No Frequently Asked Questions about P0305 Code found.
Discuss the causes and fixes for P0305 OBDII Code
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Can p0305 be causing p0141 p0138 and p0171? Also the bank one sensor 2 oxygen sensor has a few wires that are exposed due to rubbing
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What make, model and year is your vehicle? A cylinder misfire problem could cause O2 sensor codes.
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I have a 1998 GMC sierra 1500, 5.7L vortec v8. It is misfiring on cylinder 5 and I have replace the spark plugs, distributor cap and rotor and also have spark going to the cylinder. I do not think that it is the fuel injector as it also provides fuel to other cylinders and they are running fine.
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If he spark plug, distributor, and injector are good, then the next step is perform a compression test. Unfortunately there is nothing else to do, also make sure there are no air intake leaks.
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Hi everyone
today this code occur in my car Hyundai Azera v6 3.8L
it happen when I accelerate in highway the check engine is turn on and engine become weak and vibrate then I return home to read the code by my laptop while the car running and it is p0305
I turn off the car then turn it on again the engine run normally so I reset the ECU and drive my car every thing return normal
I think some dirt in the fuel injector make this code -
Yes, actually there are many things that could cause the code (spark plugs, ignition coil, etc), but dirty fuel injector is probably one of the most common one.
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Thank you OBDIITech for your responding I like to add another cause of (misfire) I have read it in Engine repair book :
- According to one Auto Engine Rebuilders Association (AERA) bulletin, incorrect valve spring tension can result in a rough idle that is only apparent on initial cold startup. OBD II engine computer systems sometimes sense this misfire and cause the malfunction indicator lamp (MIL) on the dash to illuminate.
book name:
(AUTOMOTIVE ENGINES DIAGNOSIS, REPAIR AND REBUILDING 6 T H E D I T I O N)
many thanks -
Okay. I have a simple question I can't get a straight answer for anywhere.
Let it be known I am a total novice at car repair and I am aware of this. I can change a car battery, replace brake pads, etc and I am mechanically inclined but that's the extent of it.
I need a 100% accurate answer to the location of the 5th cylander location on a 2004 Toyota Highlander (v6, 3.3 liter)
I have deducted that I need to replace the sparkplug and coil for the 5th cylinder. Manual is no help either.I have found diagrams showing the 5th cylinder in the rear driver side location but others show it in the front driver side. Any one who has the answer has my everlasting appreciation.
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