The P0264 code on your 2020 Dodge Challenger indicates a low voltage condition in the cylinder 2 fuel injector circuit. Whether you have the 3.6L Pentastar V6 or one of the HEMI V8s, this code points to a specific injector for diagnosis.
Challenger Engine Options
The 2020 Challenger offers multiple engine choices: 3.6L V6, 5.7L HEMI V8, 6.4L HEMI V8 (Scat Pack), and the supercharged 6.2L Hellcat. All use sequential port fuel injection with individual injector circuits. Cylinder 2 location varies—on V engines, it's typically the front cylinder on the passenger bank.
Low Circuit Interpretation
A low circuit reading indicates the PCM detects lower voltage than expected, typically caused by a short to ground. The injector coil may have internal short circuits, the wiring may be damaged and contacting metal, or the connector may have corrosion creating unintended ground paths.
Diagnosis Approach
Identify cylinder 2 location for your engine—V6 and V8 layouts differ. Disconnect the injector and test coil resistance (typically 11-18 ohms for Mopar injectors). Check for low resistance between the injector circuit and ground. Inspect wiring for damaged insulation, particularly near exhaust manifolds. Test the injector harness connector for corrosion.
Repair Path
A shorted injector requires replacement—HEMI injectors are readily available and affordable. For wiring shorts, repair the damaged section and add protective covering. On V8s, the injector access is straightforward. Clear codes after repair and verify through multiple drive cycles.