P0352 Ignition Coil B Primary Control Circuit/Open
What does P0352 mean?
P0352 — Ignition Coil B Primary Control Circuit/Open. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects ignition coil b primary control circuit/open. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0352
- Open or shorted coil B wiring
- Failed ignition coil
- Damaged connector pins
- Faulty PCM coil driver
How to fix P0352
- Swap coil B with a known-good coil
- Measure the coil's primary resistance
- Verify the trigger signal and power feed at the coil
- Inspect the connector and harness for damage
- Replace the coil or repair the circuit