P0491 Chrysler Code - Secondary Air Injection System Insufficient Flow Bank 1
Quick Answer
An air pump is used on the vehicle to lower tail pipe emissions on start-up. Common causes include Intake leak, Damaged AIR system components, Faulty AIR Solenoid Valve. 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
- P0491 Chrysler indicates Secondary Air Injection System Insufficient Flow Bank 1.
- Common causes
- Common causes include Intake leak, Damaged AIR system components, Faulty AIR Solenoid Valve.
- 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 P0491 Chrysler Description
What are the Possible Causes of the DTC P0491 Chrysler?
- Intake leak
- Damaged AIR system components
- Faulty AIR Solenoid Valve
- Faulty AIR system relay
How to Fix the DTC P0491 Chrysler?
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 P0491 Chrysler 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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Frequently Asked Questions about P0491 Chrysler Code
1. What does the OBDII code P0491 mean on a Chrysler vehicle?
P0491 indicates "Secondary Air Injection System Insufficient Flow Bank 1," meaning the engine control module (ECM) has detected insufficient airflow in the secondary air injection system on bank 1.
2. What are the common symptoms of code P0491?
Symptoms may include the check engine light turning on, poor engine performance, failed emissions tests, rough idling during cold starts, and a possible increase in exhaust emissions.
3. What causes the P0491 code on a Chrysler?
Common causes include a faulty secondary air injection pump, clogged or damaged air injection hoses, stuck or malfunctioning air injection check valves, or electrical issues such as damaged wiring or a blown fuse.
4. How does the secondary air injection system work in a Chrysler?
The secondary air injection system pumps fresh air into the exhaust to help burn off excess fuel and reduce emissions, especially during cold starts.
5. Can I drive my Chrysler with the P0491 code?
Driving with this code is generally safe in the short term, but it can lead to increased emissions and potentially damage the catalytic converter if left unaddressed.
6. How can I fix the P0491 code on my Chrysler?
Repairs may include cleaning or replacing the air injection pump, replacing clogged hoses or check valves, repairing damaged wiring, or replacing a blown fuse.
7. How do I diagnose the P0491 code?
Start by inspecting the air pump, hoses, and check valves for visible damage or clogging. Test the air pump for proper operation and check related electrical connections and fuses.
8. What tools are needed to diagnose P0491 on a Chrysler?
You'll need an OBDII scanner, a multimeter to test electrical circuits, and possibly tools for accessing and inspecting the air injection pump and valves.
9. How much does it cost to repair the P0491 code on a Chrysler?
Repair costs can vary, typically ranging from $100 to $500 depending on whether the issue is a faulty pump, valve, or another component.
10. Can a clogged catalytic converter cause the P0491 code on a Chrysler?
While not a common cause, a severely clogged catalytic converter can restrict airflow and potentially trigger this code.
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