What happens when the secondary air pump goes bad?
When the secondary air pump in a vehicle goes bad, it can lead to a range of issues that can impact the vehicle's performance and emissions. The secondary air pump is a crucial component in the vehicle's emissions control system, and its failure can result in various problems that require prompt attention.
Understanding the Secondary Air Pump
The secondary air pump is responsible for injecting additional air into the vehicle's exhaust system, particularly during cold starts or when the engine is under load. This additional air helps to further oxidize any unburnt fuel in the exhaust, reducing the amount of harmful emissions released into the environment.
Symptoms of a Bad Secondary Air Pump
When the secondary air pump fails, it can cause the following symptoms:
- Illuminated Check Engine Light: The vehicle's onboard diagnostic system will detect the issue with the secondary air pump and trigger the check engine light.
- Increased Emissions: Without the secondary air pump functioning properly, the vehicle's emissions will increase, potentially leading to failed emissions tests.
- Reduced Fuel Efficiency: The increased emissions can also result in a decrease in fuel efficiency, as the engine has to work harder to compensate for the issue.
- Rough Idling or Stalling: In some cases, a bad secondary air pump can cause the engine to idle roughly or even stall, particularly during cold starts or when the engine is under load.
If you notice any of these symptoms, it's important to have your vehicle inspected by a qualified mechanic as soon as possible to diagnose and address the issue with the secondary air pump.
Causes of Secondary Air Pump Failure
There are several common causes of secondary air pump failure, including:
- Electrical Issues: The secondary air pump is an electrically-powered component, and any issues with the wiring, connectors, or the pump's internal electrical components can lead to its failure.
- Mechanical Wear and Tear: Over time, the moving parts within the secondary air pump can wear down, leading to decreased performance or complete failure.
- Overheating: If the secondary air pump is subjected to excessive heat, it can cause the internal components to fail prematurely.
- Contamination: Debris or other foreign matter can enter the secondary air pump, causing it to malfunction or become blocked.
Addressing the root cause of the secondary air pump failure is crucial to ensuring the proper functioning of the vehicle's emissions control system and preventing further issues.
Repairing or Replacing the Secondary Air Pump
If the secondary air pump is found to be faulty, it will need to be repaired or replaced. Depending on the specific make and model of the vehicle, the cost of the repair can vary, but it is generally a relatively straightforward and affordable repair for most vehicles.
In some cases, the secondary air pump may be integrated into the vehicle's exhaust system, which can make the repair more complex and potentially more expensive. It's important to have a qualified mechanic diagnose the issue and provide a detailed estimate of the repair costs before proceeding.
How long does a secondary air pump last?
90 – 120 seconds
During a cold start, the secondary air pump may only be in operation for a maximum of 90 – 120 seconds. The secondary air pump is not designed for continuous use! With cold vehicle engine (“cold start”):
What are the symptoms of a secondary air injection valve stuck closed?
Illuminated check engine light. Noise coming from the air injection system. Vehicle stuck in limp mode.
Is it bad to drive with a bad secondary air pump?
The failed secondary air injection pump can cause fluctuation in power. For instance, in one minute your vehicle is performing well and in the other minute, you may face a drop in revs. Thus, you need to replace the pump to avoid continuous engine stalls and ensure a smooth drive.
Does a secondary air pump affect performance?
Mechanically speaking, the secondary air injection system only affects post-combustion operations, and so a nonfunctioning SAIS doesn't impact engine performance or fuel economy. Therefore, the sole function of the SIAS is emission reduction.
How do I know if my pump is bad?
Common symptoms and what may be causing them
- Abnormal flow. If the flow is abnormal, this is a definite sign of a problem.
- Noisy pumps. The most common noise is that of that of rocks in a can.
- Frequent clogging.
- Overheating.
- Air Leaks.
How to tell if a secondary air pump is bad?
And then lead to failure here is a direct comparison between a functioning secondary air pump and a damaged secondary. Air. Pump clear water or rust signal a leakage.
How much does it cost to fix a secondary air system?
Secondary Air Injection Pump Replacement Cost
This range typically spans from $250-$450, with somewhere in the ballpark of $325 serving as a relative average. Again, the actual price to complete such a repair will reflect the complexity of the job at hand, who works on it, as well as the price of the parts themselves.
How do I know if my secondary air pump is bad?
Bad Secondary Air Pump Symptoms
- #1 – Check Engine Light.
- #2 – Erratic Idle.
- #3 – Reduced Performance.
- #4 – Failed Emissions Test.
- #1 – Poor Power/Ground Delivery.
- #2 – Compromised Vacuum System.
- #3 – Water Contamination.
- #4 – Age.
Can a car run without a secondary air pump?
Which begs the question: Does a car need a secondary air injection system to run? Strictly speaking, no, it doesn't.
Do air pumps drain car battery?
Notes: The air tank is rated to 175 psi. If a car battery is used, be sure the vehicle is running as the compressor will drain the battery quickly.
