Ignition Switch (Run/Start) Circuit Problem
There's an issue with the ignition switch circuit that's affecting startup.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
When you turn the key or push the start button, it should send a signal to the engine control module. If that signal isn’t right, the vehicle may not start or run properly. It’s like the system isn’t getting the ‘go ahead’ to start.
What the computer is actually seeing
The computer checks for the proper voltage and continuity from the ignition switch. It expects to see approximately 12 volts when the key is in the run or start position.
What a healthy reading looks like
Expected voltage from the ignition switch should be 12.0-12.8 volts when in the 'Run' or 'Start' position.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the ignition switch position: Is it turning fully to 'Run' or 'Start'? Decision: If no, replace the ignition switch. If yes, proceed to step 2.
- 22. Verify battery voltage: Is the battery voltage between 12.0-12.8 volts? Decision: If no, charge or replace the battery. If yes, proceed to step 3.
- 33. Inspect the wiring and connectors: Are there any visible damages or corrosion in the ignition switch wiring? Decision: If yes, repair or replace the damaged components. If no, proceed to step 4.
- 44. Test the ignition switch: Use a multimeter to check voltage output at the ignition switch. Is it producing the correct voltage when in 'Run'? Decision: If no, replace the ignition switch. If yes, suspect a PCM issue or wiring in the circuit.
Common causes
- Faulty ignition switch
- Wiring issues in the ignition circuit
- Corroded connectors at the ignition switch or PCM
- Bad fuses related to ignition system
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code?
It's not safe to drive; the vehicle may not start or could stall unexpectedly.
Will this code come back after I clear it?
If the underlying problem isn't fixed, the code will reappear.
Why does this code pair with other codes?
Multiple codes may indicate related issues in the ignition or power distribution circuit.
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