AutoCodes – BMW – P1412 BMW

P1412 BMW Code - Secondary Air Injection System Max Flow Limit Check

Quick Answer

The Air Injection (AIR) System refers to an emissions control system used by some vehicle manufacturers. Common causes include Faulty Vacuum hoses damaged, Faulty One-Way Check Valve, Faulty Secondary Air Pump inoperative. 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: P1412 BMW indicates Secondary Air Injection System Max Flow Limit Check.
Common causes: Common causes include Faulty Vacuum hoses damaged, Faulty One-Way Check Valve, Faulty Secondary Air Pump inoperative.
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 Popularity 6,776

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1412 BMW Description

The Air Injection (AIR) System refers to an emissions control system used by some vehicle manufacturers. It is often called secondary air injection, because air, more specifically oxygen, is injected into the exhaust manifold after start up. Vehicles start on a comparatively rich mixture to allow for smoother running conditions. However this has a large impact on exhaust gas emissions. A notable increase in hydrocarbon (HC) and carbon monoxide (CO) emissions is found under these rich start conditions. By injecting air in to the exhaust manifold the CO and HC can be oxidised. This reaction increases the temperature within the exhaust and the exhaust gas after treatment system i.e. catalytic converter can begin working earlier due to meeting its light off temperature.
The system consists of an air pump, one way check valve and associated pipework. The system operates for a predetermined time after start up. Normally this duration is approximately three minutes, when cold.

OBDII Code P1412 BMW - Secondary Air Injection System Max Flow Limit Check - AutoCodes.com — P1412 BMW Code - Secondary Air Injection System Max Flow Limit Check

What does this mean?

What are the Possible Causes of the DTC P1412 BMW?

Faulty Vacuum hoses damaged
Faulty One-Way Check Valve
Faulty Secondary Air Pump inoperative
Secondary Air Pump harness is open or shorted
Secondary Air Pump circuit poor electrical connection

How to Fix the DTC P1412 BMW?

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 P1412 BMW 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1412 BMW Code

1. What does OBDII code P1412 on a BMW mean?

- OBDII code P1412 indicates a problem with the Secondary Air Injection System Max Flow Limit Check.

2. What are common symptoms of a P1412 fault in a BMW?

- Common symptoms include rough idling, engine misfires, reduced engine performance, and the illumination of the check engine light.

3. What are possible causes of the P1412 code in a BMW?

- The P1412 code can be triggered by issues such as a faulty secondary air pump, a clogged secondary air filter, a damaged vacuum hose, or a malfunctioning secondary air injection valve.

4. How can I diagnose the cause of a P1412 fault in my BMW?

- Diagnosing the P1412 code usually involves inspecting the secondary air pump, filter, hoses, and valves for any signs of damage or blockages. A professional diagnostic tool can also help pinpoint the exact issue.

5. Can I continue driving my BMW with a P1412 fault code?

- It is not recommended to continue driving your BMW with a P1412 fault, as it can lead to more serious engine problems if left unresolved.

6. How can I repair a P1412 fault in my BMW?

- Repairing a P1412 fault typically involves replacing the faulty secondary air pump, clearing any blockages in the system, or repairing/replacing damaged hoses or valves as needed.

7. Are there any DIY tips for fixing a P1412 fault in a BMW?

- DIY enthusiasts can start by visually inspecting the secondary air system components for any obvious issues such as loose connections or damaged parts before proceeding with any repairs.

8. How much does it cost to fix a P1412 fault in a BMW?

- The cost of fixing a P1412 fault can vary depending on the specific issue causing the code, the labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic.

9. Can a P1412 fault impact the emissions of my BMW?

- Yes, a P1412 fault can affect the emissions output of your BMW, potentially causing it to fail emissions tests and leading to environmental concerns.

10. How can I prevent the P1412 code from recurring in my BMW?

- To prevent the P1412 code from recurring, it's essential to perform regular maintenance on the secondary air injection system, including checking and replacing components as needed to ensure optimal performance.