P0012 on Subaru: How to Diagnose & Fix
Intake Camshaft Position Timing - Over-Retarded (Bank 1)
2 Subaru models · 2 documented issues · 1 critical · $50-$4,500 repair
P0012 on Subaru by model: symptoms, diagnosis and fix
The FA20 engine in the BRZ consumes oil at elevated rates during high-RPM driving, spirited canyon runs, and track use. The engine design with direct injection and high compression (12.5:1) combined with the oil-fed variable valve timing system means oil consumption increases significantly when the engine is frequently operated above 5,000 RPM. Consumption rates of 1 quart per 1,000-2,000 miles are reported by owners who drive aggressively. The narrow oil galleries in the FA20 make proper oil level maintenance critical.
Common Symptoms
- Oil level drops noticeably after spirited driving or track days
- Low oil pressure warning during hard cornering (oil starvation)
- Oil consumption of 1 qt per 1,000-2,000 miles with aggressive driving
- Blue smoke under hard acceleration
- Oil level normal during city/highway commuting but drops during performance driving
How to Fix
Check oil level before and after every spirited drive or track day. Carry an extra quart of 0W-20 (OEM spec) or 5W-30 (commonly used upgrade for track use). For track cars, install an oil catch can (Radium Engineering 20-0255-02 or Crawford Performance V3) to reduce oil vapor entering the intake. Consider an oil cooler for track use. Subaru considers up to 1 qt per 3,000 miles as acceptable.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Subaru SOA427V1310 synthetic 0W-20 engine oil, 1 quart
2013-2020 Subaru BRZ FA20 according to the live product listing; for 2021 or any modified/track-use engine, confirm the current owner manual and oil specification before purchase.
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)
The 3.6L EZ36 flat-6 engine uses timing chains instead of belts, but the chains and guides are not maintenance-free as often assumed. The timing chain tensioner and plastic chain guides wear over time, typically after 120,000-180,000 miles. Worn chains stretch, causing rough idle, misfires, and timing-related codes. The EZ36 uses three timing chains (one for each bank plus one for the center) making replacement a complex and labor-intensive job. If a chain jumps timing due to severe stretch or guide failure, valve-to-piston contact can cause catastrophic engine damage.
Common Symptoms
- Rattling or chattering noise from front of engine on cold start
- Rough idle that improves as engine warms
- Check engine light with timing correlation codes (P0016, P0017, P0018, P0019)
- Reduced engine performance
- Engine misfires at idle
- Chain noise that increases over time
How to Fix
Replace all three timing chains, chain tensioners (3 units), chain guides (6 pieces), and chain tensioner shoes. This is a major job requiring 12-16 hours of labor. Use genuine Subaru timing chain kit or quality aftermarket (OSK brand). Replace water pump, thermostat, and front crank seal while the front of the engine is disassembled. Total repair with all components: $2,500-4,000 at an independent shop.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Subaru 13143AA071 Timing Chain
one of three required chains after mechanical timing diagnosis Fitment/availability: 2008-2014 Tribeca 3.6-liter EZ36; current replacement for 13143AA070, confirm VIN/production date Fitment/availability: ships in 1-3 business days with …
- Genuine Subaru 13143AA081 Timing Chain
second timing chain after diagnosis Fitment/availability: 2008-2014 Tribeca 3.6-liter EZ36; current replacement for 13143AA080, confirm VIN/production date Fitment/availability: ships in 1-3 business days with Add to Cart live when reviewed
- Genuine Subaru 13143AA061 Timing Chain
third timing chain after diagnosis Fitment/availability: 2008-2014 Tribeca 3.6-liter EZ36; current replacement for 13143AA060, confirm VIN/production date Fitment/availability: ships in 1-3 business days with Add to Cart live when reviewed
- Genuine Subaru 13142AA050 Timing Chain Tensioner
one of three position-specific tensioners Fitment/availability: 2008-2014 Tribeca 3.6-liter EZ36, position 13142; confirm VIN Fitment/availability: ships in 1-3 business days with Add to Cart live when reviewed
- Genuine Subaru 13142AA040 Timing Chain Tensioner
second position-specific tensioner Fitment/availability: 2008-2014 Tribeca 3.6-liter EZ36, position 13142B; confirm VIN Fitment/availability: ships in 1-3 business days with Add to Cart live when reviewed
- Genuine Subaru 13142AA080 Timing Chain Tensioner
third position-specific tensioner Fitment/availability: 2008-2014 Tribeca 3.6-liter EZ36, position 13142A; confirm VIN Fitment/availability: ships in 1-3 business days with Add to Cart live when reviewed
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 (4)
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 Subaru?
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 Subaru it is documented across 2 models: BRZ, Tribeca.
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 Subaru?
Published repair estimates on Subaru range from $50 to $4,500 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.