P1351
VVT Sensor / Camshaft Position Sensor Circuit Range/Performance – Bank 2
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The P1351 code is the Bank 2 counterpart to P1346, indicating that the VVT sensor (camshaft position sensor) on Bank 2 is reporting readings outside the expected performance range. On V6 and V8 Toyota engines, Bank 2 is the cylinder bank that does not contain cylinder #1. The ECM monitors the relationship between camshaft and crankshaft positions to ensure valve timing is correct, and this code is set when that relationship deviates too far.
As a range/performance code, P1351 typically points to a mechanical or oil-system issue rather than a pure electrical fault. The most common culprits are a timing chain that has stretched from high mileage, dirty or low engine oil affecting the hydraulic VVT actuator, or a clogged oil control valve. These same issues can affect both banks simultaneously, so if you see P1346 and P1351 together, it's likely a systemic issue like neglected oil changes or a worn timing chain set.
Start your diagnosis with the simplest checks: verify oil level and condition, and change the oil if it's overdue. Next, inspect and clean the Bank 2 oil control valve and its filter screen. If these steps don't resolve the code, the VVT sensor or timing chain may need replacement. A scan tool that can display live camshaft position data will help pinpoint whether the sensor or the mechanical system is at fault.
Severity
Symptoms
- •Check Engine Light illuminated
- •Rough or uneven idle
- •Mild loss of power during normal driving
- •Slight rattling or ticking noise from the engine
- •Reduced fuel efficiency
- •Hesitation when accelerating from low speeds
Likely Causes
A worn timing chain or one that has jumped a tooth on the Bank 2 camshaft sprocket causes the cam-to-crank timing relationship to fall outside the ECM's expected range.
The VVT system relies on hydraulic oil pressure. Oil that is low, degraded, or the wrong viscosity will prevent the Bank 2 VVT actuator from maintaining correct cam position.
The sensor on Bank 2 may have developed an internal fault, producing signals that are outside the expected range for the current engine operating conditions.
Sludge and varnish deposits can restrict the OCV or its filter screen on Bank 2, preventing proper oil flow to the VVT actuator.
Corroded terminals or damaged wiring at the Bank 2 camshaft position sensor can cause erratic or out-of-range readings.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Perform an oil change with the manufacturer-recommended oil
- Clean or replace the Bank 2 oil control valve and filter screen
- Replace the Bank 2 VVT / camshaft position sensor
- Inspect the timing chain for stretch or misalignment
- Repair or replace sensor wiring and connectors