P1418 Code - Secondary Air Injection System Relay 'A' Control Circuit High
Quick Answer
A Secondary Air Injection (AIR) pump is used on this vehicle to lower tail pipe emissions on start-up. Common causes include Faulty Secondary Air Injection (AIR) System Relay, Secondary Air Injection System Relay harness is open or shorted, Secondary Air Injection System Relay 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
- P1418 indicates Secondary Air Injection System Relay 'A' Control Circuit High.
- Common causes
- Common causes include Faulty Secondary Air Injection (AIR) System Relay, Secondary Air Injection System Relay harness is open or shorted, Secondary Air Injection System Relay 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 P1418 Description
What are the Possible Causes of the DTC P1418?
- Faulty Secondary Air Injection (AIR) System Relay
- Secondary Air Injection System Relay harness is open or shorted
- Secondary Air Injection System Relay circuit poor electrical connection
How to Fix the DTC P1418?
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 P1418 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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Information for Specific Makes
- P1418 Audi — Fuel Level Sensor Circuit Signal Too High
- P1418 BMW — Secondary Air Valve Or The Tube Blocked
- P1418 Buick — Secondary Air Injection System Relay 'A' Control Circuit High
- P1418 Cadillac — Secondary Air Injection System Relay 'A' Control Circuit High
- P1418 Chevrolet — Secondary Air Injection System Relay 'A' Control Circuit High
- P1418 GMC — Secondary Air Injection System Relay 'A' Control Circuit High
- P1418 Hyundai — 2nd Air Injection Insufficient Bank 2
- P1418 Subaru — Secondary Air Injection System Control 'A' Circuit Shorted
- P1418 Volkswagen — Fuel Level Sensor Circuit Signal Too High
Frequently Asked Questions about P1418 Code
1. What are the common symptoms of OBDII code P1418?
- Common symptoms include the Check Engine Light turning on, rough idling, decreased engine performance, and increased emissions.
2. What causes the OBDII code P1418 to trigger?
- The code is triggered when the secondary air injection system relay 'A' control circuit has a high voltage signal, indicating a malfunction in the relay or its control circuit.
3. How can I diagnose the issue related to code P1418?
- Diagnosing the issue involves checking the secondary air injection system relay 'A' for proper functioning, inspecting the relay control circuit for any faults, and testing related wiring for continuity or shorts.
4. Can a faulty secondary air injection system relay 'A' cause other problems in the vehicle?
- Yes, a faulty relay can lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter over time if left unresolved.
5. Is it safe to continue driving with OBDII code P1418 present?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent further complications and ensure optimal engine performance.
6. How difficult is it to repair the secondary air injection system relay 'A' control circuit high issue?
- The repair difficulty can vary depending on the specific cause of the problem, but it typically involves replacing the faulty relay, repairing any damaged wiring or connectors, and resetting the code.
7. Are there any DIY tips for troubleshooting OBDII code P1418?
- DIY tips include checking the relay for physical damage, inspecting wiring for corrosion or loose connections, and using a multimeter to test the relay and control circuit for proper voltage.
8. Can a simple reset of the Check Engine Light resolve code P1418 temporarily?
- Resetting the Check Engine Light may temporarily clear the code, but it will likely return if the underlying issue with the secondary air injection system relay 'A' control circuit high is not addressed.
9. How much does it typically cost to repair OBDII code P1418 at a mechanic or dealership?
- The cost of repair can vary depending on the labor rates and parts needed, but it may range from $100 to $300, including diagnosis, parts, and labor.
10. Is code P1418 a common issue in specific vehicle makes and models?
- This code can be more common in vehicles with secondary air injection systems, such as certain BMW, Mercedes-Benz, and Volkswagen models, among others.
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