What does P0355 mean?
Each ignition coil turns 12 V into the high voltage that fires a spark plug. This code means the computer saw a problem in the circuit for ignition coil "E" (usually cylinder 5).
The computer tried to control the part and saw an electrical fault, usually an open circuit.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Misfire on the matching cylinder
- Rough running
- Flashing check engine light
- Loss of power
Common causes
- Open circuit in the solenoid or its wiring
- Unplugged or corroded connector
- Blown fuse feeding the component
- Failed component
How to diagnose P0355
- Check the fuse that feeds the component.
- Measure the component's resistance and compare it with the service spec.
- Check for power at the connector with the key on, and for a broken control wire back to the computer.
- Swap the coil with another cylinder and see if the problem moves.
- Check for power and a control signal at the coil connector.
How to fix it
- Replace the ignition coil
- Repair wiring
Estimated repair cost
Likely repairs for P0355 run from about $100 to $400, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Ignition coil replacement (one coil) | $150 - $400 |
| Wiring/connector repair | $100 - $400 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0355?
High severity
If misfiring, limit driving to protect the catalytic converter.
P0355 FAQ
What does P0355 mean?
P0355 stands for "Ignition Coil "E" Primary/Secondary Circuit". Each ignition coil turns 12 V into the high voltage that fires a spark plug.
Can I drive with a P0355 code?
If misfiring, limit driving to protect the catalytic converter.
How much does it cost to fix P0355?
It depends on the cause. The likely repairs for P0355 range from about $100 to $400 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0355?
The most common causes are: open circuit in the solenoid or its wiring; unplugged or corroded connector; blown fuse feeding the component.