AutoCodes – Cadillac – P1420 Cadillac

P1420 Cadillac Code - Intake Air Low Pressure Switch Circuit Low Voltage

Quick Answer

P1420 Cadillac indicates Intake Air Low Pressure Switch Circuit Low Voltage. Common causes include Faulty Intake Air Low Pressure Switch, Intake Air Low Pressure Switch harness is open or shorted, Intake Air Low Pressure Switch circuit poor electrical connection. 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 Cadillac indicates Intake Air Low Pressure Switch Circuit Low Voltage.
Common causes: Common causes include Faulty Intake Air Low Pressure Switch, Intake Air Low Pressure Switch harness is open or shorted, Intake Air Low Pressure Switch circuit poor electrical connection.
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 Popularity 3,387

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1420 Cadillac Description

OBDII Code P1420 Cadillac - Intake Air Low Pressure Switch Circuit Low Voltage - AutoCodes.com — P1420 Cadillac Code - Intake Air Low Pressure Switch Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1420 Cadillac?

Faulty Intake Air Low Pressure Switch
Intake Air Low Pressure Switch harness is open or shorted
Intake Air Low Pressure Switch circuit poor electrical connection

How to Fix the DTC P1420 Cadillac?

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 Cadillac 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1420 Cadillac Code

1. What are the common symptoms of OBDII code P1420 on a Cadillac related to the Intake Air Low Pressure Switch Circuit Low Voltage?

- Common symptoms include rough idling, reduced engine power, poor fuel efficiency, and the Check Engine Light being illuminated.

2. What typically causes the OBDII code P1420 on a Cadillac indicating Intake Air Low Pressure Switch Circuit Low Voltage?

- The code is usually triggered by a faulty intake air low-pressure switch, damaged wiring or connectors, or a problem within the switch circuit.

3. How can I diagnose the cause of OBDII code P1420 on my Cadillac for the Intake Air Low Pressure Switch Circuit Low Voltage?

- Diagnosis involves checking the intake air low-pressure switch and its wiring for any visible damage, testing the switch for proper functionality, and inspecting the circuit for continuity.

4. Can a dirty air filter trigger the OBDII code P1420 on a Cadillac related to the Intake Air Low Pressure Switch Circuit Low Voltage?

- Yes, a dirty air filter can restrict airflow, causing low pressure in the intake system, which may lead to the activation of the code.

5. Is it safe to continue driving my Cadillac with the OBDII code P1420 for the Intake Air Low Pressure Switch Circuit Low Voltage?

- It is not recommended to drive your vehicle with this code active, as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I reset the OBDII code P1420 on my Cadillac indicating Intake Air Low Pressure Switch Circuit Low Voltage?

- You can reset the code using an OBDII scanner tool by clearing the code after addressing the underlying issue that triggered it.

7. Are there any DIY repair tips for fixing the OBDII code P1420 on a Cadillac related to the Intake Air Low Pressure Switch Circuit Low Voltage?

- DIY repair tips may include checking and cleaning the air filter, inspecting the intake air low-pressure switch, and ensuring all connections are secure.

8. Will a failing oxygen sensor cause the OBDII code P1420 on a Cadillac for the Intake Air Low Pressure Switch Circuit Low Voltage?

- While a failing oxygen sensor can affect engine performance, it is not directly linked to triggering the P1420 code related to the intake air low-pressure switch circuit.

9. How long does it typically take to repair the OBDII code P1420 on a Cadillac for the Intake Air Low Pressure Switch Circuit Low Voltage?

- The repair time can vary depending on the exact cause of the issue, but it may range from 30 minutes to a few hours, including diagnosis and part replacement.

10. Can extreme weather conditions, such as very low temperatures, contribute to triggering the OBDII code P1420 on a Cadillac for the Intake Air Low Pressure Switch Circuit Low Voltage?

- Extreme weather conditions can potentially impact the performance of the intake system, leading to low pressure and the activation of the P1420 code, especially if there are pre-existing issues with the circuit.