The P1A89 fault code in automobiles indicates a problem with the Accessory Power Module (APM). The most common symptom is the illumination of the Engine Light or Service Engine Soon Warning Light. The cause of this fault code could be a faulty APM, an open or shorted APM harness, or a poor electrical connection in the APM circuit.

The importance of repairing this issue lies in the fact that it can affect the performance of various accessories in the vehicle.

The difficulty level of repairing this fault code is moderate, and it can take up to 1.0 hour to fix.

To interpret the fault code, one needs to check the possible causes listed above and visually inspect the related wiring harness and connectors for any damage or corrosion.

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 p1a89 fault code.

Here are the symptoms to look out for:

  • The P1A89 fault code in automobiles 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, and difficulty starting the engine.
  • Additionally, the vehicle may experience rough idling or stalling, and there may be a noticeable decrease in acceleration.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

The P1A89 automobile fault code can be caused by a faulty APM, open or shorted APM harness, or poor electrical connection.

  • The automobile fault code P1A89 can be caused by a faulty Accessory Power Module (APM).
  • It can also be caused by an open or shorted Accessory Power Module (APM) harness.
  • Additionally, a poor electrical connection in the Accessory Power Module (APM) circuit can also trigger this fault code.

Below are the possible fixes for the automobile fault code p1a89, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code P1A89, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors.
  • Look for 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 fault code P1A89 indicates an issue with the hybrid battery pack coolant pump control circuit. The estimated repair time for this fault is 1.0 hour. The cost of fixing this fault will depend on the hourly rate charged by the auto repair shop.

Most shops charge between $75 and $150 per hour for repairs. Therefore, the cost of fixing the P1A89 fault code will range from $75 to $150, depending on the hourly rate charged by the repair shop.

The P1A89 fault code indicates that the 42-volt system voltage is low.

The Accessory Power Module (APM) supplies energy between the high voltage, 300-volt, direct current (DC) and intermediate voltage, 42-volt, DC to support the Electric Power Steering (EPS). The APM receives a 42-volt enable command from the Hybrid Powertrain Control Module (HPCM) over the high-speed hybrid GMLAN communication circuit.

The 42-volt APM functions will only run when the 42-volt APM enable is active on the high-speed hybrid GMLAN communication circuit.

What are the possible causes of the P1A89 automobile fault code?

If you’re experiencing the P1A89 fault code, your engine light may be on. This could be due to a faulty Accessory Power Module (APM), an open or shorted APM harness, or a poor electrical connection in the APM circuit. To fix the issue, visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

How can one visually inspect the related wiring harness and connectors to fix the P1A89 fault code?

If you’re experiencing the P1A89 fault code, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, you may have a faulty Accessory Power Module (APM), an open or shorted APM harness, or a poor electrical connection in the APM 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.

What are the consequences of ignoring the P1A89 automobile fault code?

Ignoring the P1A89 fault code in your automobile can lead to serious consequences. The engine light or service engine soon warning light will remain on, indicating a problem with the Accessory Power Module (APM). The faulty APM or its related wiring harness and connectors can cause poor electrical connections, leading to potential damage to other components. It is crucial to visually inspect the wiring harness and connectors and check for damaged components to avoid further damage.

p1a89 error fault code explained

If your engine light is on, it could be due to a faulty Accessory Power Module (APM), an open or shorted APM harness, or a poor electrical connection in the APM circuit.

To fix it, visually inspect the wiring harness and connectors for damage or corrosion.

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