P1420 GMC Code - Intake Air Low Pressure Switch Circuit Low Voltage
Quick Answer
The P1420 GMC code indicates an issue with the Intake Air Low Pressure Switch Circuit Low Voltage. Common causes include Faulty intake air low pressure switch, Damaged wiring or connectors in the circuit, Malfunctioning ECM. 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 GMC 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, Malfunctioning ECM.
- 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.
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Code P1420 GMC Description
The P1420 GMC code indicates an issue with the Intake Air Low Pressure Switch Circuit Low Voltage. This means that the engine control module (ECM) has detected a lower than expected voltage signal from the intake air low pressure switch circuit. The intake air low pressure switch is a component that monitors the intake air pressure and sends a signal to the ECM to adjust the air-fuel mixture accordingly. When the voltage signal is too low, it can lead to improper fuel delivery and affect the vehicle's performance.
Common Causes of P1420 GMC
- Faulty intake air low pressure switch
- Damaged wiring or connectors in the circuit
- Malfunctioning ECM
- Vacuum leak in the intake system
- Electrical issues such as corrosion or loose connections
Symptoms of P1420 GMC
- Rough idling
- Engine stalling
- Hesitation or lack of power during acceleration
- Check engine light illuminated
- Decreased fuel efficiency
How to Fix P1420 GMC
- Begin by using a diagnostic scanner to retrieve the trouble codes and identify the specific issue related to the intake air low pressure switch circuit.
- Inspect the intake air low pressure switch, wiring, and connectors for any visible damage or wear. Replace any components that are faulty.
- Test the intake air low pressure switch using a multimeter to ensure it is functioning correctly and sending the proper voltage signal to the ECM.
- Check for any vacuum leaks in the intake system and repair or replace any damaged hoses or components.
- Clear the trouble codes from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1420 GMC
The typical repair costs for addressing a P1420 GMC code related to the intake air low pressure switch circuit low voltage can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to consult local rates for a more accurate estimate. Keep in mind that rates may be higher in metropolitan areas or at dealerships, while independent shops often offer lower prices.
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