P0491 code definition This is the OBD-II code for Secondary Air Injection System Insufficient Flow Bank 1, indicating a problem on the side of the engine which contains cylinder #1.
How do you fix a secondary air injection system malfunction?
What repairs can fix the P0410 code?
- Replacing the air injection pump and power relay.
- Replacing O2 sensors that respond too slow as they age.
- Replacing the air injection pump intake filter clogged with debris.
What causes code P0491?
Diagnostic trouble code (DTC) P0491 stands for “Secondary Air Injection Insufficient Flow Bank 1.” It is logged once the vehicle’s powertrain control module (PCM) perceives that there is a possible issue within the SAI system. This code is logged once the PCM determines that the secondary air flow in bank 1 is too low.
What causes secondary air injection malfunction?
A faulty pump is generally the most frequent cause of the system failing. Ingress of moisture can cause damage which results in seizure of the pump. Faulty ground and voltage supply can also cause the pump to fail.
How much does it cost to replace a secondary air injection pump?
How much does it cost to repair a secondary air injection system? You can expect to pay about $450 to replace your secondary air injection system. These costs are split between the cost of materials and the cost of labor. You can save money by replacing your system on your own.
How do I fix code P0491?
What repairs can fix the P0491 code?
- Replacing any damaged wiring, connectors, or other electrical components.
- Replacing the secondary air injection pump.
- Replacing the pump’s one-way check valve.
- Repairing or replacing any damaged vacuum hoses or fittings which could be causing a vacuum leak.
- Replacing pump fuses.
Where is the secondary air injection system located?
The secondary air injection pump is usually located on the engine or at least in the engine bay. It can sometimes be hidden deep into the engine bay, but mostly you will find it installed pretty visible on the engine.
How do I fix error code P2431?
What repairs can fix the P2431 code?
- Replacing the secondary air pump.
- Repairing or replacing a wiring harness.
- Resolving poor electrical connections.
What does P0410 code mean?
malfunctioning Secondary Air Injection System
Code P0410 is the result of the Engine Control Module (ECM) indicating a malfunctioning Secondary Air Injection System. This happens when the O2 sensor does not accurately detect the changes in the O2 level of the exhaust while the air injection system is functioning.
What is code P2440 mean?
Secondary Air Injection System Switching
OBD-II Code P2440 is defined as a Secondary Air Injection System Switching Valve Stuck Open. The Secondary Air Injection System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up …
Can you clean the secondary air injection system?
The basic procedure is to put solvent and compressed air into the SAI system on the top of the engine and clean the ports from the bottom until air runs freely through the passages. The supplies you will need two bottle of carburetor cleaner.
Can you drive without secondary air pump?
The system is critical to help cars achieve government emissions standards. So, the law says you need a secondary air injection system. Which begs the question: Does a car need a secondary air injection system to run? Strictly speaking, no, it doesn’t.