[SOLVED] P0428 Code: Fix High Input On Catalyst Temperature Sensor – Easy Solution!

The automobile fault code P0428 indicates a problem with the Catalyst Temperature Sensor.

The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light. The cause of this fault code can be a faulty sensor, an open or shorted harness, or a poor electrical connection in the sensor circuit.

To fix this issue, it is recommended to visually inspect the wiring harness and connectors for any damage. Look out for broken, bent, pushed out, or corroded pins in the connectors. The repair time for this problem is estimated to be around 1.0 hour.

It is important to address this issue promptly to ensure optimal performance and efficiency of the vehicle.

Repair Importance Level6.67 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p0428 fault code.

  • The symptoms of the automobile fault code P0428 include: Engine Light ON (or Service Engine Soon Warning Light).

The fault code p0428 can be caused by a faulty catalyst temperature sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit.

  • The fault code P0428 can be caused by a faulty Catalyst Temperature Sensor, an open or shorted Catalyst Temperature Sensor harness, or a poor electrical connection in the Catalyst Temperature Sensor circuit.

To fix the p0428 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code P0428, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check if there are any broken, bent, pushed out, or corroded pins in the connectors.
  • This fix typically takes around 1.0 hour to complete.

The factors influencing the cost of diagnosing and fixing the automobile fault code p0428 include the estimated repair time of 1.0 hour.

Most auto repair shops typically charge between $75 and $150 per hour for their services.

These factors contribute to the overall cost of resolving the p0428 fault code.

The P0428 fault code refers to the Catalyst Temperature Sensor High Input in Bank 1 Sensor 1.

This code is set by the Engine Control Module (ECM) when the Catalyst Temperature Sensor signal does not meet the factory specifications. The Catalyst Temperature Sensor is responsible for measuring the temperature of the catalyst and works by increasing its resistance as the exhaust gas temperature rises. When the sensor detects a high input, it triggers the P0428 fault code.

This code indicates a potential issue with the catalyst temperature sensor in the first bank of the engine.

What are the possible causes of fault code P0428 and how can I visually inspect them?

If you’re seeing the engine light on or the service engine soon warning light, it could be due to fault code P0428. This code is often caused by a faulty catalyst temperature sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit. To visually inspect these possible causes, check the related wiring harness and connectors. Look for any damaged components and examine the connector’s pins for any signs of being broken, bent, pushed out, or corroded. Taking these steps can help you identify and address the issue.

How does a faulty Catalyst Temperature Sensor affect the engine light and what steps can I take to fix it?

If you notice the engine light or service engine soon warning light is on, it could be due to a faulty catalyst temperature sensor. This can happen if the sensor harness is open or shorted, or if there is a poor electrical connection in the sensor circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. Taking these steps can help identify and resolve the problem.

What should I look for when inspecting the wiring harness and connectors related to fault code P0428?

When inspecting the wiring harness and connectors related to fault code P0428, there are a few key things to look for. Start by visually inspecting the wiring harness and connectors for any signs of damage. Check for broken, bent, pushed out, or corroded connector pins. These issues can cause a poor electrical connection and contribute to the fault code. By thoroughly examining the components and connections, you can identify any potential problems and take the necessary steps to fix them.

p0428 error fault code explained

If your engine light is on and you’re seeing the P0428 fault code, it could be due to a faulty catalyst temperature sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit. To fix this issue, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Look out for broken, bent, pushed out, or corroded connector pins.

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