AutoCodes – Generic – P142D

P142D Code - Exhaust Gas Recirculation Sensor 'D' Circuit Low

Quick Answer

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation Sensor 'D'. Common causes include Faulty Exhaust Gas Recirculation Sensor 'D', Exhaust Gas Recirculation Sensor 'D' harness is open or shorted, Exhaust Gas Recirculation Sensor 'D' 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: P142D indicates Exhaust Gas Recirculation Sensor 'D' Circuit Low.
Common causes: Common causes include Faulty Exhaust Gas Recirculation Sensor 'D', Exhaust Gas Recirculation Sensor 'D' harness is open or shorted, Exhaust Gas Recirculation Sensor 'D' 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 3,961

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 P142D Description

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation Sensor 'D'. The PCM sets the OBDII code when the Exhaust Gas Recirculation Sensor 'D' is not to factory specifications.

OBDII Code P142D - Exhaust Gas Recirculation Sensor 'D' Circuit Low - AutoCodes.com — P142D Code - Exhaust Gas Recirculation Sensor 'D' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P142D?

Faulty Exhaust Gas Recirculation Sensor 'D'
Exhaust Gas Recirculation Sensor 'D' harness is open or shorted
Exhaust Gas Recirculation Sensor 'D' circuit poor electrical connection

How to Fix the DTC P142D?

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 P142D 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.

Need more information about the P142D code?

Need more information on how to fix the P142D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P142D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P142D Buick — Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage
P142D Cadillac — Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage
P142D Chevrolet — Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage
P142D Ford — Exhaust Gas Recirculation Sensor 'D' Circuit Low
P142D GMC — Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage
P142D Lincoln — Exhaust Gas Recirculation Sensor 'D' Circuit Low
P142D Mercury — Exhaust Gas Recirculation Sensor 'D' Circuit Low

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 P142D Code

1. What does the OBDII code P142D mean?

P142D indicates that the Exhaust Gas Recirculation (EGR) Sensor 'D' circuit is reading a voltage lower than the manufacturer-specified range.

2. What are the symptoms of code P142D?

Symptoms may include a lit check engine light, rough idling, reduced engine performance, increased fuel consumption, and possible engine hesitation or stalling.

3. What causes the P142D code?

Common causes include a faulty EGR sensor, damaged wiring or connectors in the EGR circuit, carbon buildup in the EGR valve or passages, or a malfunctioning EGR valve.

4. Can I drive with a P142D code?

Driving with a P142D code is not recommended as it can lead to reduced engine performance, increased emissions, and potential damage to other engine components over time.

5. How do I diagnose a P142D code?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the EGR sensor and wiring, testing the sensor's voltage output, and checking for blockages in the EGR valve or passages.

6. How can I fix the P142D code?

Repairs may include cleaning or replacing the EGR valve, repairing damaged wiring or connectors, replacing the EGR sensor, or clearing carbon buildup in the EGR system.

7. What tools are needed to fix a P142D code?

You may need an OBDII scanner, a multimeter, basic hand tools (e.g., wrenches, screwdrivers), and a cleaning solution for carbon deposits.

8. How much does it cost to fix a P142D code?

Repair costs can vary widely but typically range from $150 to $500 depending on whether the EGR valve, sensor, or wiring needs repair or replacement.

9. What happens if I ignore the P142D code?

Ignoring the code can lead to worsening engine performance, poor fuel economy, higher emissions, and potential damage to the catalytic converter or other components.

10. Can a dirty EGR valve trigger the P142D code?

Yes, carbon buildup in the EGR valve or passages can restrict airflow and cause the sensor to read low voltage, triggering the code.