P0328 on Volkswagen: How to Diagnose & Fix
Knock Sensor 1 Circuit High Input (Bank 1)
2 Volkswagen models · 2 documented issues · 2 critical
P0328 on Volkswagen by model: symptoms, diagnosis and fix
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)
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)
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 on a Volkswagen?
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. On Volkswagen it is documented across 2 models: Eos, Beetle.
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 on a Volkswagen?
Repair costs vary widely with the root cause and Volkswagen model; each issue on this page carries its own estimate where one is published.
Looking for P0328 on a different make?
View P0328 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.