OBD
P2312
Ignition Coil E Primary Control Circuit Low
What it means
P2312 means Ignition Coil E Primary Control Circuit Low.
Check these first
- An ignition coil E primary control wire shorted to ground
- A failed ignition coil E
- An open coil E ground circuit
- Corrosion at the coil E connector
What to do next
- Check for spark at the cylinder fed by coil E
- Test the coil E primary control wire for a short to ground
- Check the coil E ground circuit
- Measure ignition coil E primary resistance
- Replace ignition coil E if the circuit tests good
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.