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AutoCodes - Generic - P040C

P040C Code - Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage

- Code Popularity: 6,661 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P040C?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2
  • Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted
  • Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P040C?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P040C code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P040C 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 P040C - Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage - AutoCodes.com
P040C Code - Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage

Need More Information on the Code?

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Information for Specific Makes

  • P040C Chevrolet Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage  📷
  • P040C Dodge Exhaust Gas Recirculation Temperature Sensor 'A' Circuit Low
  • P040C Ford Exhaust Gas Recirculation Temperature Sensor 'A' Circuit Low
  • P040C GMC Exhaust Gas Recirculation Temperature Sensor 2 Circuit Low Voltage  📷
  • P040C Isuzu Exhaust Gas Recirculation Temperature Sensor 1 Low Voltage

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Code P040C comments

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