P0017 on Subaru
Crankshaft/Camshaft Position Correlation - Bank 1 Sensor B
P0017 on Subaru vehicles indicates crankshaft/camshaft position correlation - bank 1 sensor b. Au7o has documented this code across 2 Subaru models — most commonly on BRZ, Tribeca. This code means the engine computer has detected that the crankshaft and the Bank 1 'B' camshaft (typically the exhaust camshaft) are out of their proper timing relationship with each other. The computer compares the crankshaft position signal to the camshaft position signal, and when they don't line up within the allowed window, it sets this correlation code. This usually points to mechanical timing being off, most often from a stretched or worn timing chain, a slipped or stuck variable valve timing phaser, or a tensioner problem. You may notice rough running, low power, rattling at startup, or a no-start, and it should be addressed promptly to avoid valve-to-piston contact on some engines. Typical repair costs on Subaru range from $2,500 to $4,500, depending on the specific model and root cause.
Common Causes of P0017
- •Stretched or worn timing chain
- •Worn or failed timing chain tensioner or guides
- •Stuck or faulty variable valve timing (VVT) cam phaser
- •Faulty VVT oil control/solenoid valve
- •Low or dirty engine oil affecting phaser operation
- •Faulty camshaft or crankshaft position sensor
- •Timing chain jumped a tooth or incorrect timing after service
- •Damaged reluctor (tone) ring
P0017 on Subaru by Model
Subaru BRZ(1 issue)
- FA20 Rough Idle / Hunting / Stall - ECM Reflash (TSB 11-136-14R)2013-2014
Early FA20-equipped BRZs exhibit rough idle, RPM hunting, shaking, and occasional stalling shortly after cold start. Often triggers CEL with cam timing codes P0017, P0018, or P0019. Caused by ECU's reaction to normal mechanical variation in the AVCS system rather than a hardware defect. Subaru issued an ECU reflash via TSB; later production cars received the updated calibration at factory.
Subaru Tribeca(1 issue)
- EZ36 Timing Chain Stretch and Guide Wear2008-2014
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.
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What does P0017 mean on Subaru?▼
P0017 stands for "Crankshaft/Camshaft Position Correlation - Bank 1 Sensor B." This code means the engine computer has detected that the crankshaft and the Bank 1 'B' camshaft (typically the exhaust camshaft) are out of their proper timing relationship with each other. The computer compares the crankshaft position signal to the camshaft position signal, and when they don't line up within the allowed window, it sets this correlation code. This usually points to mechanical timing being off, most often from a stretched or worn timing chain, a slipped or stuck variable valve timing phaser, or a tensioner problem. You may notice rough running, low power, rattling at startup, or a no-start, and it should be addressed promptly to avoid valve-to-piston contact on some engines. On Subaru specifically, this code is documented across 2 models.
What causes P0017 on Subaru vehicles?▼
Common causes on Subaru: Stretched or worn timing chain, Worn or failed timing chain tensioner or guides, Stuck or faulty variable valve timing (VVT) cam phaser, Faulty VVT oil control/solenoid valve, Low or dirty engine oil affecting phaser operation. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0017 on a Subaru?▼
Repair costs on Subaru range from $2,500 to $4,500, depending on the specific model and root cause.
Which Subaru models have P0017 documented?▼
Au7o has documented P0017 on 2 Subaru models: BRZ, Tribeca.