Quick Answer
P0358 means: P0358 indicates a problem with the ignition coil circuit for cylinder 8.
Can I drive with P0358? Address immediately to avoid engine damage.
Common Questions
What does P0358 mean and how does it affect my car?
P0358 indicates a malfunction in the ignition coil circuit for cylinder 8, which can lead to misfires, rough idling, and decreased fuel efficiency. Ignoring this code may cause further engine damage.
What are the most common causes of P0358 and how much does it cost to fix?
The most frequent cause is a faulty ignition coil, which can cost between $100 and $300 to replace. Wiring issues or a malfunctioning ECM could also contribute to this code.
Can I drive my car with P0358 or should I stop immediately?
It is advisable to stop driving your vehicle immediately if you receive a P0358 code, as it can lead to serious engine damage and increased repair costs.
How can I diagnose P0358 myself using GeekOBD APP?
Using the GeekOBD APP, perform an OBD2 scan to retrieve the P0358 code. Follow up with a visual inspection of the ignition coil and its wiring, checking for damage.
What vehicles are most commonly affected by P0358?
Commonly affected vehicles include the 2007-2016 Chevrolet Silverado, 2009-2015 Dodge Ram, and 2011-2015 Ford F-150. Regular maintenance checks can help prevent this issue.
How can I prevent P0358 from happening again?
To prevent P0358, ensure regular maintenance, inspect ignition components for wear, and replace spark plugs as needed. Keeping connections clean and tight can also help.
What is P0358?
DTC P0358 refers to a malfunction in the ignition coil 'H' primary/secondary circuit. This code is typically triggered by the engine control module (ECM) when it detects a fault in the ignition coil circuit for cylinder number 8 in vehicles equipped with V8 engines. Commonly found in models such as the 2007-2016 Chevrolet Silverado and the 2009-2015 Dodge Ram, this issue can lead to poor engine performance, increased emissions, and potential engine damage if not addressed promptly. In simpler terms, the ignition coil is responsible for converting battery voltage into the high voltage needed to ignite the fuel-air mixture in the engine's cylinders. When this circuit malfunctions, it can result in misfires, rough idling, and a noticeable decrease in fuel efficiency. More importantly, continuing to drive with this code can lead to further engine complications, making it crucial for car owners to understand its implications and seek timely repairs.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0358 is present:
- The check engine light illuminates continuously, indicating a fault that should be diagnosed.
- Engine misfires during acceleration, leading to a rough driving experience and hesitation.
- A noticeable drop in fuel economy, often resulting in a 10-20% increase in fuel consumption.
- Rough idling when the engine is at a standstill, which may cause vibrations within the vehicle.
- Increased emissions leading to potential issues with passing emissions testing.
Possible Causes
Most common causes of P0358 (ordered by frequency):
- The most common cause of P0358 is a faulty ignition coil, accounting for about 60% of cases. Ignition coils wear out over time due to heat and electrical stress.
- Wiring issues, such as short circuits or open circuits in the ignition coil harness, can contribute to this DTC. Inspect the wiring for damage or corrosion.
- A failing ECM may misinterpret signals, leading to false codes. Regular software updates can help prevent this issue.
- Less common but serious causes include damaged connectors or terminals that can disrupt the electrical flow.
- Rarely, the problem can stem from a defective spark plug, which can cause misfires and trigger the P0358 code.
P0358 Repair Costs
Cost Breakdown by Repair Type
Ignition Coil Replacement
Replacing the faulty ignition coil with a new OEM part.
- Total: $100 - $300
- Success rate: 85%
Wiring Repair
Repairing or replacing damaged wiring in the ignition circuit.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for P0358
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional P0358 Diagnosis Process
Follow these systematic steps to accurately diagnose P0358. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Start with an initial visual inspection
Step 1: Start with an initial visual inspection. Look for damaged wiring, loose connections, or corrosion on the ignition coil and its harness (5-10 minutes).
Step 2: Step 2: Use the GeekOBD APP to perform an OBD2 scan
Step 2: Use the GeekOBD APP to perform an OBD2 scan. Retrieve all codes and freeze frame data to get a comprehensive overview of the fault context (10-15 minutes).
Step 3: Step 3: Conduct component testing
Step 3: Conduct component testing. Utilize a multimeter to check the voltage and resistance of the ignition coil and connectors (20-30 minutes).
Step 4: Step 4: After repairs, perform a system function test to verify that the ignition system is operating correctly and clear the codes (10-15 minutes)
Step 4: After repairs, perform a system function test to verify that the ignition system is operating correctly and clear the codes (10-15 minutes).
Step 5: Step 5: Finally, perform a road test under various conditions to confirm that the issue has been fully resolved (15-20 minutes)
Step 5: Finally, perform a road test under various conditions to confirm that the issue has been fully resolved (15-20 minutes).
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: Ignition Coil Replacement on 2014 Chevrolet Silverado
Vehicle: 2014 Chevrolet Silverado 1500, 85,000 miles
Problem: Customer reported engine misfires and check engine light on.
Diagnosis: Diagnostic scan revealed P0358 code. Visual inspection showed a faulty ignition coil.
Solution: Replaced the ignition coil for cylinder 8 and cleared DTC. Verified operation.
Cost: $220 (including parts and labor)
Result: Customer reported smooth engine performance post-repair.
Case Study 2: Wiring Repair on 2011 Dodge Ram
Vehicle: 2011 Dodge Ram 1500, 90,000 miles
Problem: Customer experienced rough idling and decreased fuel efficiency.
Diagnosis: P0358 code was present. Inspected wiring and found corrosion.
Solution: Repaired damaged wiring in the ignition circuit and replaced the ignition coil.
Cost: $180 (specific cost breakdown includes $100 for parts and $80 for labor)
Result: Post-repair test showed no misfires, and fuel economy returned to normal.