AutoCodes – Chevrolet – P242C 2014 Chevrolet Silverado

P242C 2014 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage

Quick Answer

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 3, Exhaust Gas Temperature Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor 3 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: P242C 2014 Chevrolet Silverado indicates Exhaust Gas Temperature Sensor 3 Circuit Low Voltage.
Common causes: Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 3, Exhaust Gas Temperature Sensor 3 harness is open or shorted, Exhaust Gas Temperature Sensor 3 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 306

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 Jul 03, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P242C 2014 Chevrolet Silverado Description

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Exhaust temperature sensor 1 is the first exhaust temperature sensor in the exhaust system, the following exhaust temperature sensors are counted upward from the engine outlet to the exhaust system end. The Engine Control Module (ECM) supplies 5 V to the exhaust gas temperature signal circuit and supplies a ground to the low reference circuit. The exhaust gas temperature sensor temperature information is used by the ECM during the exhaust gas particulate filter cleaning process. The Diagnostic Trouble Code (DTC) will ve set when the ECM detects that the exhaust gas temperature sensor is less than 158 Ω for greater than 2 s.

OBDII Code P242C 2014 Chevrolet Silverado - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage - AutoCodes.com — P242C 2014 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P242C 2014 Chevrolet Silverado?

Faulty Exhaust Gas Temperature Sensor (EGTS) 3
Exhaust Gas Temperature Sensor 3 harness is open or shorted
Exhaust Gas Temperature Sensor 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P242C 2014 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 does this mean?

Code Tech Notes

After starting the engine, the exhaust gas temperature sensor temperature should rise steadily, then stabilize after the engine reaches operating temperature. Exhaust gas temperature sensors may fail intermittently while operating under extreme temperatures. Review the Freeze Frame/Failure Records to verify the failure criteria.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P242C 2014 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 P242C 2014 Chevrolet Silverado code?

Need more information on how to fix the P242C 2014 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 P242C 2014 Chevrolet Silverado Code

What does the OBDII code P242C mean on a 2014 Chevrolet Silverado?

1. P242C indicates a low voltage issue in the circuit for Exhaust Gas Temperature (EGT) Sensor 3, which monitors the temperature of exhaust gases in the emissions system. 2.

What are the symptoms of code P242C on a 2014 Chevrolet Silverado?

Common symptoms include an illuminated Check Engine Light, reduced fuel efficiency, possible engine derate mode, and abnormal exhaust system performance. 3.

What causes the P242C code to appear on a 2014 Chevrolet Silverado?

Potential causes include a faulty EGT sensor 3, damaged wiring or connectors, excessive soot buildup on the sensor, or a malfunctioning Powertrain Control Module (PCM). 4.

Can I drive my 2014 Chevrolet Silverado with the P242C code?

Driving with this code is possible but not recommended, as it can lead to increased emissions, reduced performance, or further damage to the exhaust system. 5.

How do I fix the P242C code on my 2014 Chevrolet Silverado?

Repairs may involve replacing the EGT sensor 3, inspecting and repairing damaged wiring or connectors, cleaning soot buildup, or updating the PCM software. 6.

Where is Exhaust Gas Temperature Sensor 3 located on a 2014 Chevrolet Silverado?

EGT Sensor 3 is typically located in the exhaust system, downstream of the Diesel Particulate Filter (DPF). Check your vehicle's service manual for the exact location. 7.

How much does it cost to repair the P242C code on a 2014 Chevrolet Silverado?

The repair cost can range from $150 to $400, depending on whether the EGT sensor needs replacement or if wiring repairs are necessary. 8.

Can a dirty Diesel Particulate Filter (DPF) cause the P242C code?

Yes, a clogged or dirty DPF can cause excessive heat buildup, which may damage the EGT sensor or affect its readings, triggering the code. 9.

How is the P242C code diagnosed on a 2014 Chevrolet Silverado?

A technician will use an OBDII scanner to confirm the code, inspect the EGT sensor and wiring for damage, and test the sensor's voltage and resistance to determine the fault. 10.

What happens if I ignore the P242C code on my 2014 Chevrolet Silverado?

Ignoring the code can lead to increased emissions, reduced engine performance, potential damage to the exhaust system, and higher repair costs in the long run.