P0328: How to Diagnose & Fix — Knock Sensor 1 Circuit High Input (Bank 1)
5 vehicles · 3 makes · $80-$7,500 repair
How to diagnose and fix P0328: 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.
Kia Sorento · 2011–2019
The Theta II 2.4L and 2.0T GDI engines in 2011-2019 Sorentos can experience catastrophic engine seizure due to machining debris left in the crankshaft oil passages during manufacturing. Metal shavings restrict oil flow to rod and main bearings, causing premature bearing wear and eventual engine lock-up. Over 340,000 Sorentos were included in NHTSA Recall 17V-224. Kia extended the powertrain warranty to 10 years/120,000 miles for affected vehicles and deployed the Knock Sensor Detection System (KSDS) software update to detect early bearing deterioration.
Common Symptoms
- Engine knocking or ticking noise that worsens over time
- Oil pressure warning light illuminated
- Metal shavings found in oil during changes
- Sudden engine stall while driving
- Excessive oil consumption (more than 1 qt per 1,000 miles)
- Check engine light with bearing-related codes
How to Fix
Check VIN eligibility for extended warranty (10 years/120,000 miles). Have dealer perform KSDS software update to detect early bearing failure. If engine is knocking, dealer will perform oil consumption test and bearing inspection. Complete engine replacement required if bearings are scored. Dealer replaces with updated long block assembly under warranty if eligible.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Owner tips & cautions
- WarningIf you hear any knocking, stop driving immediately. Continued operation with failing bearings causes catastrophic damage that may not be covered if engine locks up completely
- TipCheck your VIN at owners.kia.com/recalls - even if past the original warranty, the extended 10yr/120k warranty applies to Theta II bearing failures
- TipUse 0W-20 full synthetic oil and change every 5,000 miles to maximize bearing life. Pennzoil Platinum or Mobil 1 are frequently recommended on KiaForums
Sources for this issue (3)
Volkswagen Eos · 2008–2013
VW bulletin 2028302 covers tensioner-related loss of chain tension on specified 2008–2013 CCTA/CBFA engines. It describes start-up rattle, no-start or a malfunction lamp and possible chain skip with piston-to-valve contact. This is not evidence that every EA888 generation has the same defect.
Common Symptoms
- Rattle after engine start
- No-start condition
- Malfunction indicator lamp
How to Fix
Stop operation if timing failure is suspected and have a qualified workshop follow current applicable diagnosis. An abnormal result in the bulletin’s tensioner check supports failure; the other result requires further engine diagnosis. Assess resulting damage and choose current engine-specific parts.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- ECS 06H198004KT4 early Eos ultimate timing-chain kit
replace the production-matched early upper/lower chains, tensioners, guides, seals and service hardware Fitment/availability: Volkswagen Eos 2.0T TSI production from January 16 2008 through the 2009 model year per the retailer; confirm V…
- ECS 06H198004KT10 Eos through-2011 ultimate timing-chain kit
replace the production-matched complete chain, tensioner and guide system with covers, seals and hardware Fitment/availability: Volkswagen Eos 2.0T TSI production through December 12 2011; confirm VIN/build date and installed 06H system …
- ECS 06H198004KT Eos late-2011-through-mid-2013 ultimate timing-chain kit
replace the production-matched complete chain, tensioner and guide system with covers, seals and hardware Fitment/availability: Volkswagen Eos 2.0T TSI production from December 13 2011 through July 1 2013; confirm VIN/build date and inst…
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)
Volkswagen Beetle · 2012–2013
VW bulletin 2028302 covers tensioner-related loss of chain tension on specified 2008–2013 CCTA/CBFA engines. It describes start-up rattle, no-start or a malfunction lamp and possible chain skip with piston-to-valve contact. This is not evidence that every EA888 generation has the same defect.
Common Symptoms
- Rattle after engine start
- No-start condition
- Malfunction indicator lamp
How to Fix
Stop operation if timing failure is suspected and have a qualified workshop follow current applicable diagnosis. An abnormal result in the bulletin’s tensioner check supports failure; the other result requires further engine diagnosis. Assess resulting damage and choose current engine-specific parts.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Volkswagen Audi 06H198004 early 2.0T TSI ultimate timing-chain kit
replace a diagnosed early-generation chain/tensioner system with the matched chains, tensioners, guides, cover, sealant and required hardware Fitment/availability: Volkswagen Beetle 2.0T TSI early-generation branch; confirm VIN, engine c…
- Genuine Volkswagen Audi 06H109469AHKT3 EA888 Gen-3 ultimate timing-chain kit
replace a diagnosed Gen-3 timing-chain system with the generation-matched rails, chains, tensioners, sealant and hardware Fitment/availability: Volkswagen Beetle 2.0T EA888 Gen-3 branch; confirm VIN, engine code and production date becau…
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)
Subaru Forester · 1998–2005
Kia K5 · 2021–2025
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P0328 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 P0328 mean?
P0328 stands for "Knock Sensor 1 Circuit High Input (Bank 1)." This code means the knock sensor on engine bank 1 produced a voltage signal higher than its normal expected range. The knock sensor detects the vibrations of engine knock (detonation) so the computer can pull back ignition timing and protect the engine from damage. A high-input reading typically indicates an electrical issue such as a short to voltage or a wiring/connector fault, rather than genuine, sustained knock. While the sensor is faulted, the engine may default to conservative timing, slightly hurting performance and fuel economy.
What are the most common causes of P0328?
The most common causes of P0328 are: Faulty knock sensor (Bank 1, Sensor 1), Sensor wiring shorted to voltage or power, Damaged or corroded sensor connector, Loose or improperly torqued sensor mounting, Chafed/pinched wiring harness, Grounding or shielding fault in the circuit, Faulty engine control module (PCM) — rare. The specific cause varies by vehicle.
How much does it cost to fix P0328?
Repair costs for P0328 range from $80 to $7,500, depending on the vehicle and root cause.
Which vehicles are affected by P0328?
Au7o has documented P0328 across 5 vehicle models from 3 manufacturers: Kia, Subaru, Volkswagen.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.