P0012 on Toyota
Intake Camshaft Position Timing - Over-Retarded (Bank 1)
P0012 on Toyota vehicles indicates intake camshaft position timing - over-retarded (bank 1). Au7o has documented this code across 3 Toyota models — most commonly on Celica, RAV4, Sienna. 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. Typical repair costs on Toyota range from $50 to $2,500, depending on the specific model and root cause.
Common Causes of P0012
- •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
P0012 on Toyota by Model
Toyota Celica(1 issue)
- 2ZZ-GE Lift Bolt Failure (GT-S)2000-2005
The 2ZZ-GE engine in the Celica GT-S uses a variable valve lift system (VVTL-i) that engages at approximately 6,200 RPM. The lift bolts that actuate the high-cam profile can fail due to oil starvation or wear, preventing VVTL-i engagement. When the lift bolts fail, the engine loses its high-RPM power band entirely. Regular oil changes with quality synthetic oil are critical to preventing this failure. Many owners never rev high enough to notice the problem until they attempt spirited driving.
Toyota RAV4(1 issue)
- Water Pump Failure/Leak2013-2023
The water pump on the 2.5L 4-cylinder engine can develop leaks or fail, leading to coolant loss and potential overheating. The water pump is driven by the timing chain, so replacement requires significant labor. Some owners experience this around 80,000-120,000 miles.
Toyota Sienna(1 issue)
- 3.5L 2GR-FE Oil Leak from VVT-i System and Timing Cover2007-2020
The 3.5L 2GR-FE V6 commonly develops oil leaks from the VVT-i oil line, timing cover, and valve cover gaskets. The VVT-i oil hose fitting loosens over time, dripping oil onto the exhaust manifold creating a burning smell and fire risk.
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View P0012 across all makes →Frequently Asked Questions
What does P0012 mean on Toyota?▼
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 Toyota specifically, this code is documented across 3 models.
What causes P0012 on Toyota vehicles?▼
Common causes on Toyota: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0012 on a Toyota?▼
Repair costs on Toyota range from $50 to $2,500, depending on the specific model and root cause.
Which Toyota models have P0012 documented?▼
Au7o has documented P0012 on 3 Toyota models: Celica, RAV4, Sienna.