In brief, a no-start on a 2007 Dodge Charger usually comes down to a weak or dead battery, a faulty starter, ignition/anti-theft problems, or a fuel-delivery fault. A systematic check of power, signals, and fuel delivery typically reveals the culprit.
Common causes of a no-start
These are the main categories of faults that can stop a 2007 Charger from starting. They cover electrical, mechanical, and control-system issues you’re likely to encounter.
- Weak or dead battery, or corroded/loose battery terminals
- Faulty starter motor or solenoid, or a failing starter relay
- Ignition switch failure or immobilizer/anti-theft system preventing crank
- Fuel delivery problems: empty tank, failed fuel pump, faulty fuel pump relay, or clogged fuel filter
- Engine sensors or timing issues: crankshaft position sensor, camshaft position sensor, MAF/MAP sensors, or ignition coil problems
- Blown fuses or faulty relays in starting or fuel-supply circuits
- Bad grounds or damaged wiring in battery/starting circuits
Most no-start conditions originate in electrical power, the starting circuit, or fuel delivery. Isolating the issue starts with confirming power at key points and listening for the starter.
Immobilizer and anti-theft considerations
If the dash shows a security light or the engine won’t crank despite a healthy battery, the car’s anti-theft system could be blocking starting. A recognized key must be read by the vehicle’s immobilizer; try a spare key if available and ensure the key is suitable for your model year. If the immobilizer is suspected, professional assistance or a dealer may be required to reset or reprogram the system.
Diagnostics: how to diagnose the problem
Use these steps to isolate the cause without guessing. Perform them in order and stay within safe, practical limits for a DIY check.
- Check the battery's health and connections: measure voltage with the key off (around 12.6 volts is good); inspect terminals and tighten or clean as needed.
- Try to crank the engine and listen closely: a single click often points to a bad starter/solenoid or insufficient current; no sound can indicate ignition switch or immobilizer issues.
- Attempt a jump start with a known-good battery or jump pack: if the Charger starts, the battery or alternator is likely at fault.
- Inspect fuses and relays related to starting and fuel: specifically check the starter relay and the fuel pump relay for continuity or signs of damage.
- Scan for fault codes with an OBD-II scanner: look for codes related to crank/cam sensors, ignition, or immobilizer to guide further checks.
- Check fuel pressure and ignition spark: verify there is fuel pressure at the rail and confirm spark at a plug during cranking to determine whether the issue is fuel or ignition related.
These steps help determine whether the problem lies in power, the starting/ignition circuit, or fuel delivery. If a failed component is identified, replace or service it, and consider professional assistance for more complex checks.
What to check if the engine cranks but won’t start
If the engine turns over but doesn’t start, focus shifts to fuel delivery, ignition, and timing-related sensors. This scenario is common on 2007 Chargers with the 3.5L V6 or the Hemi engines.
- Fuel system problems: weak or failed fuel pump, clogged filter, or insufficient fuel pressure
- Ignition and spark: faulty coils, plugs, or ignition module resulting in no or weak spark
- Crankshaft position sensor or camshaft position sensor failure, which tells the ECU when to fire and inject
- Mass airflow (MAF) or MAP sensor issues, causing incorrect air-fuel mixture
- Electrical control/module issues: immobilizer or PCM faults can block starting even with a cranking engine
- Timing concerns: a skipped timing event due to chain or belt wear can prevent proper combustion (less common on these engines but possible)
Diagnosing with a fuel pressure test, spark check, and code scan will reveal whether the problem is fuel, ignition, or timing related.
When to seek professional help
Starting problems can be complex, especially if immobilizer systems, anti-theft modules, or timing-related components are involved. If basic checks don’t yield a clear cause, or you’re uncomfortable working with electrical systems or fuel pressure, a qualified mechanic or Dodge dealership is the safest option.
Summary
A 2007 Dodge Charger that won’t start is most often due to electrical power issues, problems in the starting or ignition circuits, immobilizer faults, or fuel-delivery faults. A structured approach—confirm battery health, inspect connections, test for starter operation, check fuses/relays, read codes, and verify fuel and spark—usually identifies the culprit. When in doubt, especially with immobilizer or timing-related concerns, professional help is the prudent path.