The P203D fault code in automobiles indicates a problem with the Reductant Level Sensor. The most common symptom is the illumination of the Engine Light or Service Engine Soon Warning Light.

The cause of this issue could be a faulty Reductant Level Sensor, an open or shorted harness, or a poor electrical connection. It is important to address this issue promptly as it can lead to reduced fuel efficiency and increased emissions.

The repair process involves visually inspecting the wiring harness and connectors for any damage or corrosion. The difficulty level of this repair is considered to be moderate, and it typically takes around 1.0 hour to fix.

It is crucial to interpret the fault code accurately to ensure the correct repair is performed.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the engine light on or service engine soon warning light, it could be a sign of p203d fault code.

Here are the symptoms to look out for:

  • The P203D fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include reduced engine power, decreased fuel efficiency, rough idling, stalling, and difficulty starting the engine.
  • Additionally, the vehicle may experience a decrease in acceleration or a loss of power while driving.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

The automobile fault code p203d can be caused by a faulty reductant level sensor, open or shorted harness, or poor electrical connection.

  • The automobile fault code P203D can be caused by a faulty Reductant Level Sensor.
  • It can also be caused by an open or shorted Reductant Level Sensor harness.
  • Additionally, a poor electrical connection in the Reductant Level Sensor circuit can also trigger this fault code.

To fix the p203d automobile fault code, check the possible causes and inspect the related wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p203d, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The automobile fault code P203D can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops.

Therefore, the total cost of fixing the P203D fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The P203D code is related to the Reductant Level Sensor Circuit High.

The Diesel Exhaust Fluid (DEF) Tank Level Sensor and Diesel Exhaust Fluid (DEF) Tank Temperature Sensor are used to measure the level and temperature of the fluid inside the DEF Tank.

The sensors are not sold separately and must be replaced with the DEF Supply Pump assembly. The DEF Dosing Control Unit monitors these inputs and reports them to the Powertrain Control Module (PCM). The PCM will illuminate the MIL lamp after this diagnostic runs and fails for two consecutive trips.

Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.

What are the possible causes of the P203D automobile fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the P203D fault code. This code is usually caused by a faulty reductant level sensor, an open or shorted reductant level sensor harness, or a poor electrical connection in the reductant level sensor circuit. To fix this issue, you should visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

How can I visually inspect the wiring harness and connectors related to the Reductant Level Sensor?

If you’re experiencing an illuminated Engine Light or Service Engine Soon Warning Light, it could be due to a faulty Reductant Level Sensor or an open/shorted harness. To fix this issue, start by visually inspecting the wiring harness and connectors related to the sensor. Check for any damaged components and look for broken, bent, pushed out, or corroded connector pins. This will help you identify any poor electrical connections and get your vehicle back on track.

What are the steps to take if I find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection of the P203D fault code?

If you find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection of the P203D fault code, you should visually inspect the related wiring harness and connectors. Check for any possible causes listed above and look for damaged components. It is important to fix any issues with the wiring harness and connectors to ensure proper functioning of the Reductant Level Sensor.

p203d error fault code explained

If your engine light is on and you have a P203D fault code, it may be due to a faulty Reductant Level Sensor or poor electrical connection. Check the wiring harness and connectors for damage or corrosion.

Look for broken, bent, or pushed out pins.

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