When your 2020 Dodge Charger refuses to start and the check engine light is illuminated, the stored diagnostic trouble codes likely hold the key to your problem. The check engine light indicates the computer has detected a malfunction that may be directly preventing starting.
Reading the Diagnostic Codes
Before extensive troubleshooting, have the diagnostic codes read with a scan tool. Many auto parts stores offer free code reading. The specific codes guide diagnosis directly to the failing system. Without codes, you're troubleshooting blindly.
Codes That Prevent Starting
Certain fault codes cause the computer to actively prevent starting as a protection measure. Crankshaft or camshaft position sensor codes often disable starting since the engine can't time fuel injection or spark. Security system codes may disable the fuel pump. Severe misfire codes can disable starting to prevent catalytic converter damage.
Sensor-Related No-Start Conditions
The Charger's HEMI engines rely on crankshaft and camshaft position sensors to synchronize the firing sequence. A failed sensor prevents the computer from knowing engine position, making fuel injection and ignition timing impossible. These codes (typically P0335, P0340, P0344 and similar) commonly cause no-start conditions.
Fuel System Fault Codes
Codes related to fuel pressure, fuel pump circuits, or injector operation indicate the engine isn't receiving fuel. The Charger's fuel pump is controlled through the TIPM (Totally Integrated Power Module), which has been known to cause intermittent fuel pump issues on some Chrysler products.
Security System and Immobilizer
The SKIS (Sentry Key Immobilizer System) can set codes when key recognition fails. A security-related code combined with a no-start condition means the system isn't authorizing fuel delivery. The security light behavior provides clues - solid illumination or rapid flashing indicates active lockout.
Differentiating Cause and Effect
Some codes are caused by the no-start condition rather than causing it. Misfire codes may store simply because the engine cranked but didn't start. Focus on codes related to core starting systems - sensors, fuel delivery, and security - rather than codes that result from failed starting attempts.