P1420 Buick Code - Intake Air Low Pressure Switch Circuit Low Voltage
Quick Answer
The P1420 Buick code indicates a problem with the Intake Air Low Pressure Switch Circuit Low Voltage in the vehicle. Common causes include Faulty intake air low pressure switch, Damaged wiring or connectors in the circuit, ECM malfunction. 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 Buick indicates Intake Air Low Pressure Switch Circuit Low Voltage.
- Common causes
- Common causes include Faulty intake air low pressure switch, Damaged wiring or connectors in the circuit, ECM malfunction.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1420 Buick Description
The P1420 Buick code indicates a problem with the Intake Air Low Pressure Switch Circuit Low Voltage in the vehicle. This switch is responsible for monitoring the pressure of the intake air and sending signals to the engine control module (ECM) to adjust the air-fuel mixture accordingly. When the voltage in the circuit is lower than the specified range, it triggers this diagnostic trouble code (DTC).
Common Causes of P1420 Buick
- Faulty intake air low pressure switch
- Damaged wiring or connectors in the circuit
- ECM malfunction
- Clogged air filter restricting airflow
- Vacuum leaks in the intake system
Symptoms of P1420 Buick
- Rough idling or engine stalling
- Reduced power and acceleration
- Poor fuel efficiency
- Check Engine Light illuminated
- Increased emissions
How to Fix P1420 Buick
- Begin by diagnosing the issue using a scan tool to confirm the P1420 code and pinpoint the exact cause of the problem.
- Inspect the intake air low pressure switch, wiring, and connectors for any signs of damage or corrosion. Replace or repair as necessary.
- Check the ECM for any faults or programming issues that may be causing the low voltage signal. Reset or reprogram if needed.
- Verify the integrity of the intake system, including the air filter and hoses, to ensure proper airflow.
- Clear the code and test drive the vehicle to confirm that the issue has been resolved.
Cost to Fix P1420 Buick
The typical repair costs for addressing the P1420 Buick code can vary depending on the specific cause of the issue. Parts such as the intake air low pressure switch or wiring components may range from $50 to $200, while labor costs can add an additional $100 to $300. Overall, the total repair bill may fall between $150 to $500. However, it is recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your location and vehicle model. Labor rates typically range from $80 to $150 per hour, with variations based on the shop's location and expertise.
Need more information about the P1420 Buick code?
Need more information on how to fix the P1420 Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1420 Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1420 Buick Code
No Frequently Asked Questions about P1420 Buick Code found.
Discuss the causes and fixes for P1420 Buick OBDII Code
Code P1420 Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.