P1418 GMC Code - Secondary Air Injection System Relay 'A' Control Circuit High
Quick Answer
The P1418 GMC code indicates a problem with the Secondary Air Injection System Relay 'A' Control Circuit being stuck in the high position. Common causes include Faulty Secondary Air Injection System Relay 'A', Damaged wiring or connectors in the control circuit, PCM malfunction. 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
- P1418 GMC indicates Secondary Air Injection System Relay 'A' Control Circuit High.
- Common causes
- Common causes include Faulty Secondary Air Injection System Relay 'A', Damaged wiring or connectors in the control circuit, PCM malfunction.
- 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.
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Code P1418 GMC Description
The P1418 GMC code indicates a problem with the Secondary Air Injection System Relay 'A' Control Circuit being stuck in the high position. The Secondary Air Injection System is responsible for injecting fresh air into the exhaust system to help reduce harmful emissions. In this case, the control circuit for Relay 'A' is not functioning properly, which can lead to issues with the overall performance of the vehicle.
Common Causes of P1418 GMC
- Faulty Secondary Air Injection System Relay 'A'
- Damaged wiring or connectors in the control circuit
- PCM malfunction
- Clogged air injection system components
- Vacuum leak in the system
Symptoms of P1418 GMC
- Check Engine Light illuminated
- Increased emissions
- Reduced fuel efficiency
- Engine misfires
- Vehicle fails emissions test
How to Fix P1418 GMC
- Diagnose the issue using a scan tool to confirm the P1418 GMC code and pinpoint the exact cause of the problem.
- Inspect the wiring and connectors in the control circuit for any damage or corrosion. Repair or replace as needed.
- Test the Secondary Air Injection System Relay 'A' to ensure it is functioning properly. Replace if faulty.
- Check for any clogs in the air injection system components and clear them out.
- Clear the code from the PCM and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1418 GMC
The typical repair costs for addressing the P1418 GMC code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable prices for the repair.
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