Description of DTC code P2033

OBD2 DTC P2033 refers to a high voltage condition found by the Powertrain Control Module (PCM) in the Exhaust Gas Temperature (EGT) sensor circuit. This sensor protects the Catalytic Converter (TWC) from possible damage due to high temperatures. In diesel engines, the EGT sensor determines the regeneration time of the Diesel Particulate Filter (DPF) as temperatures rise.

The EGT sensor is a resistor that changes with heat. It converts the exhaust gas temperature into a voltage signal that is sent to the PCM. It has 5 volts of reference and a ground signal. The higher the exhaust temperature, the lower the resistance, as a result, a high voltage is obtained. The opposite happens when the temperature is low, thus the resistance is high along with a low voltage.

Symptoms of fault code P2033

  • Check Engine light ON.
  • Motor failures.
  • Low energy conditions may be present.

Causes of OBD2 P2033

Reasons to set the P2033 OBDII fault code:

  • Mismatched or corroded cables or connectors in the system.
  • A short to ground in the circuit due to broken or defective wires.
  • The Exhaust Gas Temperature Sensor may have failed.

Possible solutions of the DTC code P2033

To troubleshoot the P2033 OBD2 diagnostic code, consider this:

  • After locating the EGT Sensor in your vehicle, check its electrical connections. Check the connectors for corrosion and the wires for proper operation. Repair or replace any of these components that present inconsistencies. Check especially worn wires because they could cause a shortage in the circuit.
  • Check the resistance of the EGT sensor, which should be around 150 ohms. A result below 50 ohms indicates that the sensor is defective. Replace it.

Codes related to P2033

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