Description of DTC code P0053

When DTC code P0053 OBDII is set, it is because the Powertrain Control Module (PCM) has observed that the electrical resistance of the Oxygen Sensor (O2) control circuit number 1 in bank 1 is outside the default parameter.

The resistance in this circuit is usually 8 ohms or close to 8 ohms. Note that the resistance value varies by manufacturer. If there is a difference of at least 10% of this value, this code is established.

Because the exhaust stream content changes continuously during normal engine operation, the O2 sensor uses the variable oxygen content of the exhaust gas to produce signal voltages, which are used by the PCM to control changes in fuel supply, ignition time, and timing of the VVT (Variable Valve Timing) system valves. When the oxygen sensor is working properly, it reacts to changes in oxygen content quickly, ensuring that the PCM can manage the engine efficiently.

Symptoms of fault code P0053

  • Check Engine light illumination.
  • Difficulty to start.
  • Higher fuel consumption.
  • The engine loses power.

Causes of OBD2 P0053

The reasons that lead to the establishment of diagnostic code P0053 OBD2 are:

  • The connectors may not be properly plugged in or the cables may be burned or worn.
  • The Oxygen Sensor (O2) may be defective.
  • Maybe there are blown fuses.
  • The motor control relay may be in bad condition.

Possible solutions of the DTC code P0053

To fix the bugs in the P0053 OBDII error code you must do the following:

  • Check all cables associated with the sensor. If there are cables in bad condition, you should replace them. Also, make sure there is a considered distance from the cables to the exhaust system.
  • Perform continuity, voltage, ground, and resistance tests on all associated cables. Compare the results to the manufacturer's specifications. Pay special attention to resistance values. Change the cables if the values obtained are not within these specifications, then delete the code.
  • If after having done all the wiring checks, the code returns, removes the Oxygen Sensor and checks its resistance. The value you get must match the specifications. It has to be a specific resistance for the correct operation of the sensor. If this is not the case, change the O2 Sensor.

Codes related to P0053

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