HIGH System: Variable Valve Timing (VVT) SAE J2012 Standard

P0012: Camshaft Position 'A' Timing Over-Retarded (Bank 1)

The ECM detects that the Bank 1 intake camshaft timing is retarded compared to the commanded target position. The phaser failed to advance when commanded, typically due to lack of hydraulic oil pressure.

Driveability & Safety Advisory

Drive cautiously to repair shop. Sluggish acceleration and hard starting.

Official Manufacturer TSB Advisories

Toyota T-SB-0087-09 Target: 2007–2011 Toyota Camry / RAV4 (2.4L 2AZ-FE)

Factory Condition: VVT-i gear internal lock pin does not disengage due to low oil pressure.

OEM Service Remedy: Replace camshaft timing gear assembly.

Physical Component Location & Service Access

Front of cylinder head near timing chain.

Electrical Specifications & Live PID Benchmarks

Scan Tool Live Data Targets

VVT Advance: Remains at 0.0° when commanded to 25.0°

Digital Multimeter (DMM) Specs

VVT Solenoid Resistance: 6.8 – 9.5 Ohms

Documented Model-Specific Case Studies

2005–2010 Ford F-150 (5.4L 3V)

Root Cause: Worn cam phasers and low oil pressure.

Verified Fix: Replace VCT solenoids and phasers.

Technician Inspection & Testing Workflow

Check engine oil level.

Bench test VVT solenoid with 12V.

Clean VVT oil screen.

Cost Breakdown

DIY Replacement Parts: $35 – $90

Independent Repair Shop (Parts + Labor): $200 – $450

Standard Diagnostic Time: 1.0 – 2.0 Flat-Rate Hours

Tools & Parts Matrix

Recommended Parts: VVT Solenoid, Synthetic engine oil

Required Test Tools: 10mm socket, Multimeter

Diagnostic Questions & Answers

What is the difference between P0011 and P0012?

P0011 means the camshaft is stuck too far advanced; P0012 means it is stuck too far retarded.