P2423 Infiniti Code - HC Adsorption Catalyst Efficiency Below Threshold Bank 1
Quick Answer
The Engine Control Module (ECM) monitors the phase gap between the heated oxygen sensor 2 signal and the heated oxygen sensor 3 signal. Common causes include Hydro Carbon (HC) adsorption catalyst (under floor), Exhaust tube, Intake air leaks. 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
- P2423 Infiniti indicates HC Adsorption Catalyst Efficiency Below Threshold Bank 1.
- Common causes
- Common causes include Hydro Carbon (HC) adsorption catalyst (under floor), Exhaust tube, Intake air leaks.
- 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 P2423 Infiniti Description
The phase gap between the heated oxygen sensor 2 signal and the heated oxygen sensor 3 signal becomes small as the Hydrocarbon (HC) adsorption catalyst (underfloor) deteriorates.
When the phase gap between the heated oxygen sensor 2 signal and the heated oxygen sensor 3 signal approaches a specified limit value, the HC adsorption catalyst (underfloor) malfunction is diagnosed.
What are the Possible Causes of the DTC P2423 Infiniti?
- Hydro Carbon (HC) adsorption catalyst (under floor)
- Exhaust tube
- Intake air leaks
- Faulty Fuel injector
- Fuel injector leaks
- Faulty Spark plug
- Improper ignition timing
How to Fix the DTC P2423 Infiniti?
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 P2423 Infiniti 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 P2423 Infiniti Code
1. What does the OBDII code P2423 mean on an Infiniti?
P2423 indicates that the Hydrocarbon (HC) Adsorption Catalyst Efficiency for Bank 1 is below the manufacturer's threshold, meaning the catalytic converter may not be functioning properly.
2. What are the common symptoms of code P2423 in an Infiniti?
Symptoms may include the Check Engine Light turning on, reduced fuel efficiency, increased exhaust emissions, and potential engine performance issues.
3. What causes the P2423 code in an Infiniti?
Common causes include a failing catalytic converter, damaged oxygen sensors, engine misfires, exhaust leaks, or issues with the fuel system.
4. Can a faulty oxygen sensor trigger the P2423 code?
Yes, a malfunctioning upstream or downstream oxygen sensor can send incorrect data to the ECU, leading to the P2423 code being stored.
5. How do you diagnose the P2423 code on an Infiniti?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the catalytic converter, checking for exhaust leaks, testing oxygen sensor functionality, and verifying proper engine operation.
6. Is it safe to drive an Infiniti with the P2423 code?
Driving with this code may be safe in the short term, but prolonged driving can lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter or other components.
7. How is the P2423 code fixed on an Infiniti?
Repairs may include replacing the catalytic converter, repairing exhaust leaks, replacing faulty oxygen sensors, or addressing engine misfires and fuel delivery issues.
8. Can a clogged catalytic converter cause the P2423 code?
Yes, a clogged or failing catalytic converter can reduce its efficiency, triggering the P2423 code.
9. How much does it cost to repair the P2423 code on an Infiniti?
The cost depends on the root cause. Replacing a catalytic converter can range from $1,000 to $2,500, while replacing oxygen sensors or fixing exhaust leaks is generally less expensive.
10. Can using the wrong fuel cause the P2423 code?
Yes, poor-quality or incorrect fuel can lead to incomplete combustion, increasing hydrocarbon emissions and potentially triggering the P2423 code.
Discuss the causes and fixes for P2423 Infiniti OBDII Code
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