P0012 on Toyota vehicles
Intake Cam Over-Retarded (Bank 1, VVT) — what it means on a Toyota, whether it's safe to drive, and the fixes by model and year.
P0012 on a Toyota means intake cam over-retarded (bank 1, vvt). Most vehicles stay drivable short-term, but diagnose it promptly. The most common cause is stuck-closed vvt oil control valve (cannot direct oil to advance the cam) (typically $100–$450). Pick your Toyota model below for its known failure patterns, recalls, and TSBs.
What does P0012 mean on a Toyota?
P0012 is set when the engine control module commands the Bank 1 intake camshaft to a specific advance position and the actual cam position remains too retarded — the phaser is stuck in or near its base position instead of advancing as commanded. P0012 is the inverse of P0011; both point at the same family of failures but in the opposite direction.
P0012 is a standardized OBD-II code, so its definition is the same on every Toyota. What differs by model and engine is which cause is most likely — pick your Toyota model below for a diagnosis tuned to its known failure patterns, recalls, and TSBs.
Is it safe to drive a Toyota with P0012?
In most cases a Toyota stays drivable for short trips with P0012 active, but diagnose and repair it promptly. This is a high-severity code — ignoring it can lead to further damage or a failed emissions test. Exact tolerance depends on the model and engine.
What causes P0012 on a Toyota?
| Cause | Likelihood | Estimated repair (USD) |
|---|---|---|
| Stuck-closed VVT oil control valve (cannot direct oil to advance the cam) | Most common | $100–$450 |
| Low engine oil level or pressure | Most common | $50–$200 |
| Sludged oil galleries restricting flow to the phaser | Common | $100–$600 |
| Failed cam phaser stuck at base (retarded) position | Common | $600–$1,800 |
| Cam position sensor reporting offset position | Occasional | $100–$400 |
| Wiring fault between PCM and the OCV | Occasional | $80–$350 |
Repair costs are typical US ranges and vary by Toyota model, model year, and labor rate. A diagnostic trouble code is a symptom, not a guaranteed failed part — confirm the root cause before replacing anything.
P0012 by Toyota model
Select your Toyota model and year for a P0012 diagnosis tuned to that vehicle's failure patterns, recalls, and TSBs.
Toyota RAV4
691 NHTSA owner complaints · 9 recalls on record across the years covered below.
Toyota Camry
842 NHTSA owner complaints · 6 recalls on record across the years covered below.
Toyota Corolla
721 NHTSA owner complaints · 8 recalls on record across the years covered below.
Toyota Tacoma
583 NHTSA owner complaints · 15 recalls on record across the years covered below.
Toyota 4Runner
170 NHTSA owner complaints · 16 recalls on record across the years covered below.
Toyota Highlander
650 NHTSA owner complaints · 11 recalls on record across the years covered below.
Toyota Sienna
393 NHTSA owner complaints · 22 recalls on record across the years covered below.
Complaint and recall counts are NHTSA totals for the model years covered on this site, not counts specific to P0012.
P0012 on other makes
Other codes on Toyota vehicles
P0012 on a Toyota: frequently asked questions
What does diagnostic trouble code P0012 mean on a Toyota?
P0012 is set when the engine control module commands the Bank 1 intake camshaft to a specific advance position and the actual cam position remains too retarded — the phaser is stuck in or near its base position instead of advancing as commanded. P0012 is the inverse of P0011; both point at the same family of failures but in the opposite direction. P0012 is a standardized OBD-II code, so the definition is the same on every Toyota — which cause is most likely varies by model and engine.
What are the symptoms of P0012 on a Toyota?
Check Engine Light is illuminated. Loss of mid-range torque. Sluggish acceleration. Reduced fuel economy. Rough idle. Engine may feel "doughy" or unresponsive. Possible cold-start cam-area rattle
What causes P0012 on a Toyota?
Stuck-closed VVT oil control valve (cannot direct oil to advance the cam) (most-common). Low engine oil level or pressure (most-common). Sludged oil galleries restricting flow to the phaser (common). Failed cam phaser stuck at base (retarded) position (common). Cam position sensor reporting offset position (occasional). Wiring fault between PCM and the OCV (occasional)
Is it safe to drive a Toyota with P0012?
In most cases a Toyota stays drivable for short trips with P0012 active, but it should be diagnosed and repaired promptly — this is a high-severity code. Ignoring it can lead to further damage or a failed emissions test. Exact tolerance depends on the model and engine.