P1420 Code - NOx Adsorptive Catalyst System Efficiency Below Threshold
Quick Answer
P1420 indicates NOx Adsorptive Catalyst System Efficiency Below Threshold. Common causes include Faulty Catalyst Temperature Sensor Failure, Software update. 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
- P1420 indicates NOx Adsorptive Catalyst System Efficiency Below Threshold.
- Common causes
- Common causes include Faulty Catalyst Temperature Sensor Failure, Software update.
- 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 P1420 Description
What are the Possible Causes of the DTC P1420?
- Faulty Catalyst Temperature Sensor Failure
- Software update
How to Fix the DTC P1420?
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 P1420 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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Information for Specific Makes
- P1420 Acura — NOx Adsorptive Catalyst System Efficiency Below Threshold
- P1420 Audi — Secondary Air Injection Control Module Electrical Malfunction
- P1420 BMW — Secondary Air Valve Control Circuit Electrical
- P1420 Buick — Intake Air Low Pressure Switch Circuit Low Voltage
- P1420 Cadillac — Intake Air Low Pressure Switch Circuit Low Voltage
- P1420 Chevrolet — Intake Air Low Pressure Switch Circuit Low Voltage
- P1420 Ford — Catalyst Temperature Sensor
- P1420 GMC — Intake Air Low Pressure Switch Circuit Low Voltage
- P1420 Honda — NOx Adsorptive Catalyst System Efficiency Below Threshold
- P1420 Lexus — EVAP Canister Small Leak
- P1420 Lincoln — Catalyst Temperature Sensor
- P1420 Mercury — Catalyst Temperature Sensor
- P1420 Subaru — Fuel Tank Pressure Control Solenoid Valve Circuit High
- P1420 Suzuki — EVAP System Vent Valve Stuck Open/Closed
- P1420 Toyota — EVAP Canister Small Leak
- P1420 Volkswagen — Secondary Air Injection Control Module Electrical Malfunction
Frequently Asked Questions about P1420 Code
1. What are the common symptoms of OBDII code P1420?
- Common symptoms include the illumination of the Check Engine Light (CEL), reduced engine performance, and potential increase in emissions.
2. What are the possible causes of OBDII code P1420?
- The code can be triggered by a faulty NOx adsorptive catalyst, oxygen sensors, wiring issues, or a malfunctioning catalytic converter.
3. How does a NOx adsorptive catalyst work in the vehicle's emissions system?
- The NOx adsorptive catalyst is designed to store and then release nitrogen oxides during specific driving conditions to reduce harmful emissions.
4. Can driving habits affect the efficiency of the NOx adsorptive catalyst?
- Yes, frequent short trips or stop-and-go driving can decrease the efficiency of the catalyst over time.
5. How can I diagnose and repair OBDII code P1420?
- A diagnostic scan tool can help pinpoint the exact cause of the code. Repair may involve replacing faulty components or addressing wiring issues.
6. Is it safe to continue driving with OBDII code P1420 present?
- While the vehicle may still be operable, it is recommended to address the underlying issue promptly to prevent potential damage to the emissions system.
7. Can a dirty air filter contribute to triggering OBDII code P1420?
- Yes, a clogged or dirty air filter can affect the air-fuel mixture and lead to inefficient operation of the emissions system, potentially triggering the code.
8. Are there any maintenance tips to prevent OBDII code P1420 from recurring?
- Regularly servicing the emissions system, including replacing oxygen sensors and inspecting the catalytic converter, can help prevent the reoccurrence of the code.
9. Will resetting the Check Engine Light resolve OBDII code P1420?
- Resetting the CEL may temporarily turn off the light, but if the underlying issue is not addressed, the code is likely to reappear after some driving cycles.
10. Can extreme weather conditions impact the efficiency of the NOx adsorptive catalyst?
- Yes, extreme temperatures or humidity levels can affect the performance of the catalyst and contribute to triggering OBDII code P1420.
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