Introduction

The exhaust gas temperature (EGT) sensor in a Dodge Charger is a vital component that monitors the temperature of exhaust gases to ensure the engine and emissions system operate efficiently and safely. By measuring exhaust temperatures, the EGT sensor protects the catalytic converter from overheating, helps optimize fuel trim, and prevents potential engine damage. Understanding the precise location of this sensor on your specific Charger model can save significant diagnostic time, prevent accidental damage during repairs, and enhance your troubleshooting accuracy.

While EGT sensors are sometimes mistaken for oxygen sensors, they serve distinctly different functions. Oxygen sensors measure oxygen content in the exhaust to manage air-fuel ratios, whereas EGT sensors measure the thermal energy of the exhaust gases. Modern Dodge Chargers typically employ two-wire EGT sensors that use a negative temperature coefficient (NTC) thermistor; this means their electrical resistance decreases as the exhaust temperature rises. The powertrain control module (PCM) uses this temperature data to fine-tune engine parameters, trigger warning lights, or even reduce engine power if exhaust temperatures reach hazardous levels.

Understanding the Exhaust Gas Temperature Sensor

Before diving into the sensor’s location, it is important to understand how the EGT sensor functions and how it is mounted. The sensor usually screws into the exhaust manifold or exhaust pipe using a threaded boss, commonly sized 10 mm or 12 mm. It consists of a small metal probe—often referred to as the thermocouple tip—and a two-pin wiring harness connector. Designed to endure extreme conditions, EGT sensors can withstand temperatures ranging from −40 °F up to well over 1600 °F, enabling them to reliably monitor exhaust heat even under severe operating conditions.

In Dodge Chargers, the EGT sensor is a key part of the emissions control system. It monitors the temperature of exhaust gases both entering and exiting the catalytic converter. This is crucial because catalytic converters are sensitive to excessive heat, which can damage their internal substrate. If the converter overheats—often due to issues like a rich air-fuel mixture or cylinder misfires—the EGT sensor sends a signal to the PCM to adjust ignition timing, fuel delivery, or, in severe cases, limit engine power to prevent damage. Depending on the model and engine, Chargers may have either one or two EGT sensors: an upstream sensor located before the catalytic converter and a downstream sensor located after it.

Dodge Charger EGT Sensor Locations by Engine

The exact location of the EGT sensor depends heavily on the engine type and model year of your Charger. Below is a detailed breakdown of the sensor placement across the most common engine options.

V6 3.6L Pentastar (2011–present)

For the popular 3.6L Pentastar V6 engine, the primary EGT sensor is usually mounted in the left (driver’s) exhaust manifold, close to the flange where the manifold meets the downpipe. It is threaded directly into the manifold and oriented with the probe pointing downward. Starting with 2015 and newer models, many Chargers also include a second, downstream EGT sensor located on the right (passenger) side, positioned just after the catalytic converter near the flex pipe.

Accessing the downstream sensor generally requires removing the under-engine splash shield to reach the sensor and wiring harness. The sensor connector typically has a gray or black plastic tab, which clicks securely into place.

Visual cues: Look for a small cylindrical sensor about 1 inch long with two wires—often black and white—extending from the manifold or pipe. The wiring harness usually runs along the driver’s side of the engine bay, routed neatly toward the rear of the engine compartment.

V8 5.7L HEMI (2006–present)

The 5.7L HEMI V8 Charger features its primary EGT sensor on the left exhaust manifold, typically located just after the outlet for cylinder #7. This sensor is mounted on the upper surface of the manifold, close to the heat shield. A secondary sensor may be installed on the right exhaust pipe, positioned immediately after the catalytic converter.

On 2011–2014 Charger models, the upstream sensor is relatively easy to spot from above the engine bay. However, in later models, it may be partially obscured by the intake manifold, requiring removal of the air filter box and engine cover for better access.

Additional notes: The 5.7L HEMI uses EGT sensor feedback not only for emissions control but also to protect the variable valve timing (VVT) system during high-load scenarios. Faulty sensors can trigger diagnostic trouble codes (DTCs) such as P0546 (EGT sensor circuit high input) or P0036-related codes, which correspond to sensor circuit issues.

V8 6.4L/392 HEMI (2015–present, Charger Scat Pack)

The 6.4L naturally aspirated HEMI engine, featured in Charger Scat Pack models, has an EGT sensor located on the left exhaust manifold near the manifold collector. This sensor is usually accessed from underneath the vehicle, near the front of the engine. Additionally, a downstream sensor is mounted on the exhaust pipe just behind the catalytic converter on the driver's side.

To access the downstream sensor, it is typically necessary to remove heat shields covering the exhaust pipe. The 6.4L engine uses a specialized high-temperature EGT sensor with a unique part number different from the 5.7L version. Always verify the correct replacement sensor by using your vehicle’s VIN or consulting a parts database.

Supercharged 6.2L Hellcat (2015–present)

The Hellcat’s supercharged 6.2L V8 engine takes exhaust temperature monitoring to the next level with four EGT sensors—two per cylinder bank—for highly precise thermal management designed to prevent detonation and engine damage under extreme conditions.

  • Bank 1 (left side): One sensor is located in the left exhaust manifold; the other is in the left downpipe before the catalytic converter.
  • Bank 2 (right side): One sensor is located in the right exhaust manifold; the other is in the right downpipe before the catalytic converter.

These Hellcat sensors are smaller than typical EGT sensors and feature a distinctive connector. Accessing the downpipe sensors requires removing underbody panels and sometimes the front sway bar. The manifold sensors can be reached from above after removing the engine cover and heat shields.

Step-by-Step Guide to Locate and Access the Sensor

Locating the EGT sensor on your Dodge Charger requires methodical steps and proper safety precautions. Below is a detailed guide to help you find and access the sensor efficiently.

Tools and Preparation

  • Socket set including 10 mm and 12 mm sockets, and possibly a specialized EGT sensor socket
  • Ratchet with extensions for reaching tight spaces
  • Jack and jack stands or a vehicle lift for safe undercarriage access
  • Flashlight or inspection light for visibility in dark engine areas
  • Safety glasses and heat-resistant gloves for personal protection
  • Penetrating oil (such as PB Blaster) to loosen seized sensor threads
  • Multimeter for sensor testing (optional but recommended)

Safety First

Before starting, ensure the exhaust system has cooled completely, as it can reach temperatures exceeding 600 °F during operation. Work on a level surface, engage the parking brake, and use wheel chocks to prevent vehicle movement. If raising the car, always use jack stands to support the vehicle securely; never rely solely on a jack.

Step 1: Raise the Vehicle (If Needed)

If you need to access a downstream sensor located on the exhaust pipe beneath the vehicle, raise the Charger high enough to comfortably crawl underneath. Secure the vehicle with jack stands placed at manufacturer-recommended lift points. For upstream sensors on the exhaust manifold, you may be able to reach them from above without raising the car.

Step 2: Identify Exhaust Components

Locate the exhaust manifold(s) or catalytic converter pipe. On a cold engine, visually scan for a small sensor protruding from the manifold or pipe with a two-wire connector. Most EGT sensor connectors use weatherproof locking plugs that click when engaged. The sensor’s metallic body will typically be around 1 inch long, cylindrical, and threaded into the exhaust.

Step 3: Follow the Wiring Harness

Trace the sensor wires from the connector back toward the engine wiring harness. The wiring is often bundled or taped neatly, which helps confirm you have identified the correct sensor. On V8 models, the left manifold sensor wiring often routes behind the engine toward the PCM connector located on the passenger side.

Step 4: Inspect for Multiple Sensors

Many Chargers have more than one EGT sensor, especially in V8 and Hellcat models. Inspect both driver and passenger sides of the exhaust system. Downstream sensors are generally positioned within 6 inches of the catalytic converter outlet. Use masking tape or a marker to label each sensor location for clarity during diagnosis or replacement.

Step 5: Visual Identification Tips

Photograph hard-to-see areas with your phone to refer back during reassembly. The EGT sensor differs from an oxygen sensor in several ways:

  • It is smaller and has only two wires (oxygen sensors typically have four or five wires).
  • The sensor tip is smooth and cylindrical, not threaded like a spark plug.
  • The sensor base may have a hexagonal shape for wrench grip, but it is less bulky than O₂ sensors.

Common Signs of a Faulty EGT Sensor

Knowing the sensor’s location is essential for troubleshooting. Here are common symptoms indicating a failing or faulty EGT sensor:

  • Check Engine Light (CEL): The PCM may trigger DTCs such as P0544, P0546, P0547, P0549, P0036, P0038, or P0050, which relate to EGT sensor circuit faults.
  • Reduced engine power or limp mode: The vehicle may limit power output to prevent damage when the PCM detects abnormal exhaust temperatures.
  • Poor fuel economy: Incorrect temperature readings can cause the engine to run rich or lean, affecting mileage.
  • Excessive exhaust heat: In extreme cases, the catalytic converter may glow red, especially visible at night.
  • Black smoke from the tailpipe: A rich air-fuel mixture caused by faulty sensor input can lead to incomplete combustion and black smoke emissions.

If you experience these symptoms, use a scan tool capable of live data monitoring to observe the EGT sensor’s temperature readings. The temperature should rise smoothly as the engine warms. A sensor stuck at a low reading or showing erratic/extreme values is likely malfunctioning and should be tested or replaced.

Testing and Replacing the EGT Sensor

Testing the sensor before replacing it can help avoid unnecessary parts costs. The following outlines basic electrical testing and replacement procedures.

Electrical Testing

To test the EGT sensor:

  1. Disconnect the sensor connector.
  2. Using a digital multimeter, measure resistance across the two sensor terminals.
  3. At room temperature (approximately 70 °F), an NTC sensor should read between 100k and 200k ohms.
  4. Apply heat to the sensor tip using a heat gun or carefully with a propane torch (do not damage the sensor). The resistance should decrease steadily as the temperature rises.
  5. If the resistance remains constant, is open (infinite), or does not change predictably, the sensor is defective and requires replacement.

Replacement Procedure

  1. Disconnect the vehicle’s battery negative terminal to prevent electrical shorts.
  2. Locate and unplug the EGT sensor connector.
  3. Apply penetrating oil to the sensor’s threaded base and allow it to soak for 5–10 minutes to ease removal.
  4. Use a 10 mm or 12 mm socket wrench—or a specialized EGT sensor socket—to remove the sensor by turning counterclockwise.
  5. Apply a small amount of anti-seize compound to the threads of the new sensor to prevent future seizing. Do not use Teflon tape as it can interfere with the sensor’s grounding and function.
  6. Install the new sensor and tighten it to the manufacturer’s specification, typically around 20 ft-lb. Always consult the factory service manual for exact torque values.
  7. Reconnect the sensor wiring harness.
  8. Reattach the battery negative terminal.
  9. Clear any stored codes using an OBD-II scan tool and perform a test drive to verify proper sensor operation and that no warning lights return.

Additional Tips and Resources

For more detailed information and support, consider the following resources:

  • Factory Service Manual: Obtain an official PDF manual from Mopar Service Manuals for exact torque specifications, wiring diagrams, and troubleshooting protocols.
  • Online Parts Catalogs: Websites like RockAuto provide part diagrams, OEM and aftermarket sensor options, and compatibility checks based on year, make, and model.
  • Community Forums: Engage with fellow Charger enthusiasts on forums such as Charger Forumz, where users share photos, repair tips, and specific sensor location details for various Charger trims and years.
  • Professional Diagnostics: If locating or diagnosing the sensor proves challenging, professional mechanics equipped with smoke machines and advanced scan tools can detect exhaust leaks or sensor faults more precisely.

Be aware that on some Charger models, the EGT sensor may be integrated into the catalytic converter assembly, making separate replacement impossible. Always cross-check your specific vehicle’s parts catalog before purchasing replacement sensors.

Conclusion

Successfully locating the exhaust gas temperature sensor on a Dodge Charger requires a clear understanding of your engine type, model year, and the sensor’s role in the vehicle’s emissions and engine management system. Most commonly, the EGT sensor is found mounted on the left exhaust manifold or just downstream of the catalytic converter, but configurations vary significantly among the 3.6L V6, 5.7L HEMI, 6.4L 392, and Hellcat engines.

By following the detailed descriptions provided in this guide, along with the step-by-step location and access procedures, you can efficiently identify, test, and replace the EGT sensor as needed. Prioritize safety by allowing the exhaust system to cool fully and employing proper lifting and protective gear. Utilize factory manuals, reputable parts catalogs, and community forums to enhance your repair process. Proper maintenance and timely replacement of the EGT sensor contribute to optimal engine performance, improved fuel economy, and prolonged catalytic converter life in your Dodge Charger.