AutoCodes – Lincoln – P1420 Lincoln

P1420 Lincoln Code - Catalyst Temperature Sensor

Quick Answer

The Powertrain Control Module (PCM) monitors the Catalyst Temperature Sensor. Common causes include Faulty Catalyst Temperature Sensor, Catalyst Temperature Sensor harness is open or shorted, Catalyst Temperature Sensor 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 Lincoln indicates Catalyst Temperature Sensor.
Common causes: Common causes include Faulty Catalyst Temperature Sensor, Catalyst Temperature Sensor harness is open or shorted, Catalyst Temperature Sensor 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 1,363

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 Sep 24, 2019

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

The Powertrain Control Module (PCM) monitors the Catalyst Temperature Sensor. The PCM sets the OBDII code when the Catalyst Temperature Sensor is not to factory specifications.

OBDII Code P1420 Lincoln - Catalyst Temperature Sensor - AutoCodes.com — P1420 Lincoln Code - Catalyst Temperature Sensor

What does this mean?

What are the Possible Causes of the DTC P1420 Lincoln?

Faulty Catalyst Temperature Sensor
Catalyst Temperature Sensor harness is open or shorted
Catalyst Temperature Sensor circuit poor electrical connection

How to Fix the DTC P1420 Lincoln?

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 Lincoln 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 Lincoln Code

1. What are the common symptoms of OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- Common symptoms include poor engine performance, decreased fuel efficiency, and potential issues with emissions.

2. What are the possible causes of OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- Possible causes include a faulty catalyst temperature sensor, damaged wiring or connectors, or issues with the sensor circuit.

3. How can I diagnose OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the sensor and its wiring for damage, and testing the sensor's resistance.

4. How can I repair OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- Repair may involve replacing the catalyst temperature sensor, repairing or replacing damaged wiring, or addressing any issues with the sensor circuit.

5. Can I drive my vehicle with OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and potential safety risks.

6. Will resetting the OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to return.

7. How much does it cost to repair OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- The cost of repair can vary depending on the cause of the issue, but it may involve parts and labor expenses ranging from $100 to $500 or more.

8. Are there any DIY tips for fixing OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- DIY tips include checking the sensor and wiring for visible damage, cleaning connectors, and following repair instructions from a reliable source.

9. How long does it take to repair OBDII code P1420 (Lincoln) related to the Catalyst Temperature Sensor?

- The repair time can vary based on the complexity of the issue, but it may take anywhere from 1 to 3 hours or more to diagnose and fix the problem.

10. Can a faulty catalyst temperature sensor cause other issues in the vehicle?

- Yes, a faulty catalyst temperature sensor can potentially lead to poor engine performance, increased emissions, and other related problems if not addressed promptly.