Regeneration Control Switch Circuit Low

Where it lives

For P25BB, the switch sits on the circuit this code reports. The description of P25BB reports a fault at the switch.

Check these first

• A short to ground on the regeneration control switch signal wire
• A stuck regeneration control switch held in the pressed position
• A loose or corroded connector at the regeneration control switch
• An open in the regeneration control switch ground circuit

What to do next

1. Read the regeneration control switch input on a scan tool
2. Test the switch signal wire for a short to ground
3. Check the switch ground circuit for an open
4. Inspect the switch and connector for sticking or corrosion
5. Replace the regeneration control switch if the circuit tests good
6. Clear the code and retest

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