P0355 Cadillac Code - Ignition Coil 5 Control Circuit
Quick Answer
The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0355 Cadillac indicates Ignition Coil 5 Control Circuit.
- Common causes
- Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0355 Cadillac Description
What are the Possible Causes of the DTC P0355 Cadillac?
- Faulty Ignition Coil 5
- Ignition Coil 5 harness is open or shorted
- Ignition Coil 5 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0355 Cadillac?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0355 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0355 Cadillac Code
1. What does the OBD-II code P0355 mean on a Cadillac?
P0355 indicates a malfunction in the ignition coil "E" control circuit, typically corresponding to cylinder 5.
2. What are the common symptoms of code P0355 on a Cadillac?
Symptoms may include engine misfires, rough idling, poor acceleration, decreased fuel efficiency, and the Check Engine Light turning on.
3. What causes the P0355 code to appear on a Cadillac?
Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a malfunctioning PCM (Powertrain Control Module), or corroded electrical connections.
4. How can I diagnose the P0355 code on my Cadillac?
Start by inspecting the ignition coil on cylinder 5, checking for damage or loose connections. Use a multimeter to test circuit continuity and verify proper voltage. A scan tool can help monitor live data for abnormalities.
5. Can I drive my Cadillac with the P0355 code?
Driving with this code is not recommended, as it can lead to further engine damage, reduced performance, and increased emissions.
6. How do I fix the P0355 code on a Cadillac?
Repairs may include replacing the ignition coil on cylinder 5, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
7. How much does it cost to repair the P0355 code on a Cadillac?
The cost depends on the specific repair. Replacing an ignition coil typically costs $100–$300, while wiring repairs or PCM replacement can vary significantly.
8. Can a bad spark plug cause the P0355 code?
While P0355 specifically relates to the ignition coil circuit, a bad spark plug can indirectly contribute to misfire symptoms and should be inspected during diagnosis.
9. What tools are needed to fix the P0355 code on a Cadillac?
Common tools include an OBD-II scanner, a multimeter, and basic hand tools like screwdrivers and socket wrenches for coil replacement or wiring inspection.
10. Will clearing the P0355 code fix the problem?
Simply clearing the code won't fix the underlying issue. The problem must be diagnosed and repaired to prevent the code from returning.
Discuss the causes and fixes for P0355 Cadillac OBDII Code
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i have cadi sts 2006. i have changed all of the sparkplugs and ignition coils . i am still getting po303 po351 po353 and po355. i am wondering what else it could be. The engine misses at idle when you drive it. it seems to go away.
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