AutoCodes – Chevrolet – P041C 2018 Chevrolet Silverado

P041C 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1, Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 1 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: P041C 2018 Chevrolet Silverado indicates Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1, Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 1 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 257

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 Jun 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P041C 2018 Chevrolet Silverado Description

The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. The Engine Control Module (ECM) supplies 5 volts to the EGR temperature sensor signal circuit and a ground for the low reference circuit. When the EGR temperature sensor is cold, the sensor resistance is high. When the EGR temperature increases, the sensor resistance decreases. The ECM detects a higher voltage on the EGR temperature signal circuit with high sensor resistance. With lower sensor resistance, the ECM detects a lower voltage on the EGR temperature signal circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the EGR temperature sensor resistance is less than 147 Ω for greater than 5 s.

OBDII Code P041C 2018 Chevrolet Silverado - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com — P041C 2018 Chevrolet Silverado Code - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P041C 2018 Chevrolet Silverado?

Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1
Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted
Exhaust Gas Recirculation Temperature Sensor 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P041C 2018 Chevrolet Silverado?

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 P041C 2018 Chevrolet Silverado 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 P041C 2018 Chevrolet Silverado code?

Need more information on how to fix the P041C 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P041C 2018 Chevrolet Silverado Code

What does the OBDII code P041C mean for a 2018 Chevrolet Silverado?

P041C indicates that there is a low voltage issue with the Exhaust Gas Recirculation (EGR) temperature sensor 1 circuit, which can affect the vehicle's emissions control system.

What are the common symptoms of the P041C code?

Common symptoms include a check engine light, poor fuel economy, rough idling, and reduced engine performance.

What could cause the P041C code to trigger?

The code can be triggered by a faulty EGR temperature sensor, damaged wiring or connectors in the circuit, or issues with the engine control module (ECM).

How can I diagnose the P041C code?

To diagnose the P041C code, check the EGR temperature sensor for proper operation, inspect the wiring and connectors for damage, and use a multimeter to test for voltage and resistance in the circuit.

What repairs might be needed to fix the P041C code?

Repairs may include replacing a faulty EGR temperature sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if it is found to be faulty.

Can I drive my Chevrolet Silverado with the P041C code?

While you can drive the vehicle, it is not recommended as it may lead to poor engine performance and increased emissions. It's best to address the issue promptly.

Will the P041C code affect my vehicle's emissions?

Yes, the P041C code can impact your vehicle's emissions, potentially causing it to fail an emissions test due to improper functioning of the EGR system.

How much does it typically cost to repair the P041C code?

Repair costs can vary widely, but they often range from $100 to $500, depending on whether you need to replace the EGR temperature sensor, fix wiring issues, or address ECM problems.

How can I clear the P041C code after repairs?

You can clear the P041C code using an OBDII scanner after making the necessary repairs, or by disconnecting the vehicle's battery for a short period. However, ensure the issue has been resolved before doing so.