Ignition Switch Circuit High Input
This code indicates a high voltage detected in the ignition switch circuit.
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)
The ignition switch circuit should normally see about 0 to 0.5 volts when the ignition is off. If it sees more than 5 volts, the computer will flag this as a problem, which usually means there's an issue with the wiring or the switch itself.
What the computer is actually seeing
When the ignition is off, the voltage in the ignition switch circuit should remain low (less than 0.5V). Seeing over 5 volts in this circuit triggers the B2208 code.
What a healthy reading looks like
Expected voltage in ignition switch circuit: 0.0 - 0.5 volts (OFF), 12-14 volts (ON).
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.
- 1Check the ignition switch connector for corrosion or damage. Replace if necessary.
- 2Inspect the wiring for frays or shorts to power or ground. Repair any damaged wiring found.
- 3Measure the voltage at the ignition switch connector with the ignition off. It should be below 0.5 volts. If it's higher, trace back to the wiring for a short to power.
- 4With the ignition in the 'ON' position, measure the voltage again. It should read between 12-14 volts. If it's outside this range, replace the ignition switch.
Common causes
- Short circuit in the wiring
- Faulty ignition switch
- Poor ground connection
- Damaged connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's advised to fix it soon, but the vehicle may still be drivable. However, intermittent starting issues could occur.
Will this code come back after clearing?
If the underlying issue is not resolved, yes, the code is likely to return.
Why does this code appear alongside B2207?
Both codes typically indicate issues with the ignition switch circuit, likely due to similar underlying wiring faults.
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