If your 2021 Honda Accord displays a P0206 code, this indicates a malfunction in the cylinder 6 fuel injector circuit. This code applies to Accord models equipped with the 3.5L V6 engine, as the four-cylinder models only have four cylinders.
2021 Accord Engine Options
The 2021 Accord is available with either the 1.5L turbo four-cylinder or the 2.0L turbo four-cylinder. The V6 was discontinued after 2017. If you're seeing P0206, either your Accord is a pre-2018 model with the V6, or there may be a diagnostic system error. Verify your engine type before proceeding.
If You Have a 2018 or Earlier V6 Accord
On the J35 3.5L V6, cylinder 6 is located on the rear bank (firewall side), the third cylinder from the front. The injector faces the intake manifold plenum, requiring some disassembly for access. This location exposes the connector to heat from the engine and firewall.
Diagnosis Steps for V6 Models
Access the cylinder 6 injector connector by removing the intake manifold cover and plenum as needed. Inspect for heat damage to the wiring and connector. Measure injector resistance—J35 injectors should measure approximately 12 ohms. Test for ECM trigger signal using a noid light or oscilloscope during cranking.
Resolution
Injector replacement on the V6 Accord requires removing the intake manifold for full access. Replace the injector O-rings during installation. If wiring damage is found, repair using heat-resistant materials given the rear-bank location. Verify the repair with multiple drive cycles.