The P0276 code on your 2022 Toyota 4Runner indicates a low voltage condition in the cylinder 6 fuel injector circuit. The 4Runner's proven V6 engine requires proper injector operation for the performance and reliability this SUV is known for.
4Runner Engine Configuration
The 2022 Toyota 4Runner uses the 4.0L 1GR-FE V6 producing 270 horsepower. This naturally aspirated engine uses port fuel injection. Cylinder 6 is located on the rear bank (firewall side), being the rearmost cylinder. The injector faces the intake manifold.
Low Circuit Interpretation
A low voltage condition indicates the ECM is detecting reduced voltage in the cylinder 6 circuit, typically caused by a short to ground. The injector coil may have developed internal shorts, the wiring may be contacting metal components, or connector corrosion may create unintended ground paths.
Diagnostic Steps
Access the rear bank to locate the cylinder 6 injector—this may require removing the intake plenum or working from underneath. Disconnect and measure injector resistance (expect approximately 12-15 ohms). Check for low resistance between the circuit and chassis ground. Inspect wiring near exhaust manifolds where heat can damage insulation.
Repair Solutions
A shorted injector requires replacement. The 4Runner's V6 injectors are accessible but the rear bank requires some disassembly. For wiring faults, repair the short and add protective loom. Clear codes and verify repair through drive cycle monitoring. The 4Runner's proven engine typically returns to perfect operation after proper repair.