P0012 on Hyundai: How to Diagnose & Fix
Intake Camshaft Position Timing - Over-Retarded (Bank 1)
2 Hyundai models · 2 documented issues · 1 critical · $300-$2,500 repair
P0012 on Hyundai by model: symptoms, diagnosis and fix
The Continuous Variable Valve Timing (CVVT) actuator and its associated oil control valve (OCV) on the Santa Fe's Theta II engine can fail, causing rough idle, poor fuel economy, and check engine lights. The OCV gets clogged with sludge from extended oil change intervals, and the CVVT actuator's internal components wear out. This issue can also trigger timing-related fault codes and affect emissions.
Common Symptoms
- Check engine light
- Rough idle
- Poor fuel economy
- Rattling noise on startup
- Hesitation on acceleration
How to Fix
Replace the CVVT actuator (camshaft phaser) and the oil control valve. Clean the oil passages feeding the VVT system. Switch to a high-quality full synthetic oil and maintain strict oil change intervals (5,000 miles or less). In some cases, cleaning the OCV with throttle body cleaner can restore function temporarily, but replacement is the permanent fix.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Hyundai intake oil-flow control valveOEMHyundai 24355-2G500
Confirm VIN, engine, build date and intake position; do not use for 2007-2010, 2016-2019,
- Genuine Hyundai exhaust oil-flow control valveOEMHyundai 24375-2G500
Confirm the exact VIN, engine, model body and exhaust positio
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Sources for this issue (2)
The 3.3L and 3.8L Lambda V6 engines in the Azera use timing chains with hydraulic tensioners that can fail due to oil pressure loss or internal wear. The tensioner relies on consistent oil pressure to maintain chain tension, and low oil levels or degraded oil can cause the tensioner to lose pressure, resulting in chain slack and noise. In severe cases, the chain can jump timing, causing valve-to-piston contact on these interference engines. Regular oil changes and maintaining proper oil levels are critical.
Common Symptoms
- Rattling or chain noise on cold start
- Check engine light with timing codes
- Rough idle
- Reduced engine power
- Engine noise increases with RPM
How to Fix
Diagnose the concern by verifying oil level/condition, scanning for cam/crank correlation codes such as P0016-P0019, and listening for front cover timing chain rattle on cold start; if noise or correlation faults are present, remove the front timing cover and inspect the primary/secondary chains, hydraulic tensioners, guides, and cam phasers/CVVT components for wear or slack. Repair typically involves replacing the timing chain tensioners, guides, and chains as a complete timing set, changing the engine oil and filter, and addressing any root cause of low oil pressure such as sludge, a restricted pickup, or a worn oil pump. If the chain has jumped timing, perform a compression or leak-down test to check for bent valves before reassembly because these Lambda engines are interference designs. Typical repair cost is about $1,500-$3,000 depending on parts replaced and labor time, with substantially higher cost if cylinder head or valve damage is found.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Melling 3-1045S 18-piece stock-replacement timing setOEMMelling 3-1045S; JEGS 689-3-1045S
complete chains/guides/tensioners/sprockets repair set after oil-pressure, correlation and mechanical inspection confirms timing-system wear Fitment/availability: Melling application bulletin covers 2006-2011 Hyundai 3.3L and 2006-2012 H…
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Sources for this issue (1)
P0012 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 P0012 mean on a Hyundai?
P0012 stands for "Intake Camshaft Position Timing - Over-Retarded (Bank 1)." This code means the intake camshaft timing on Bank 1 is more retarded than the computer commanded — the variable valve timing system isn't reaching its target position. The computer controls camshaft timing through an oil-fed actuator (cam phaser) and a control solenoid; when actual timing lags the desired setting, this code sets. It is commonly caused by oil flow problems (low, dirty, or wrong oil), a stuck solenoid, or a worn cam phaser. Symptoms can include rough idle, reduced power, poor fuel economy, and sometimes rattling on startup. On Hyundai it is documented across 2 models: Santa Fe, Azera.
What are the most common causes of P0012?
The most common causes of P0012 are: Low, dirty, or incorrect-viscosity engine oil, Faulty or stuck intake camshaft (VVT) oil control solenoid, Worn or stuck camshaft phaser/actuator, Clogged solenoid screen or oil passages, Wiring or connector problems at the solenoid, Timing chain wear or stretch affecting cam timing, Faulty camshaft position sensor. The specific cause varies by vehicle.
How much does it cost to fix P0012 on a Hyundai?
Published repair estimates on Hyundai range from $300 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0012 on a different make?
View P0012 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.