[SOLVED] P1149 Code: Fix Air/Fuel Ratio Sensor 1 Circuit Range/Performance Issue!

The automobile fault code P1149 indicates a problem with the AirFuel Ratio Sensor 1. This can cause the Engine Light to turn on or the Service Engine Soon Warning Light to illuminate.

The possible causes include 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. Check for broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this issue is estimated to be around 1.0 hour.

To interpret the fault code, refer to the “Possible Causes” listed above and perform the necessary inspections and repairs.

Repair Importance Level10.0 (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 p1149 fault code.

  • The symptoms of the automobile fault code P1149 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1149 can be caused by a faulty AirFuel Ratio Sensor 1, an open or shorted harness, or a poor electrical connection in the sensor circuit.

  • The fault code P1149 can be caused by the following: a faulty Air/Fuel Ratio Sensor 1, an open or shorted harness for the Air/Fuel Ratio Sensor 1, and a poor electrical connection in the circuit of the Air/Fuel Ratio Sensor 1.

To fix the p1149 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1149, 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 for broken, bent, pushed out, or corroded connector pins.
  • This fix is estimated to take approximately 1.0 hour.

The factors influencing the diagnosis and fixing cost of the automobile fault code p1149 are the estimated repair time and the hourly rate charged by auto repair shops. The estimated repair time for this fault code is 1.0 hour. Auto repair shops typically charge between $75 and $150 per hour for their services.

These factors will determine the overall cost of diagnosing and fixing the p1149 fault code.

The P1149 fault code refers to a problem with the AirFuel Ratio (AF) sensor 1 in the exhaust system. This sensor detects the oxygen content in the exhaust gas and transmits voltage output to the Engine Control Module (ECM)Powertrain Control Module (PCM).

The AF sensor has a built-in heater that stabilizes and speeds up the detection of oxygen content by controlling the current flowing through it.

The current amperage is proportional to the oxygen content in the exhaust gas, allowing the ECMPCM to measure the airfuel ratio. If the AF sensor voltage is low, indicating a lean airfuel ratio, the ECMPCM will issue a Rich command through AF feedback control. Conversely, if the AF sensor voltage is high, indicating a rich airfuel ratio, the ECMPCM will issue a Lean command.

If the AF sensor heater is not activated or if the ECMPCM terminal voltage remains below a certain value for a set period of time, a malfunction is detected and the P1149 fault code is stored.

This indicates a problem with the AF sensor 1 circuit range or performance.

What are the possible causes for the automobile fault code p1149?

If you see the engine light on or the service engine soon warning light, the fault code P1149 could be the culprit. This code is often caused by a faulty air/fuel ratio sensor 1, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit. To fix the issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage or corrosion, and check for broken, bent, pushed out, or corroded pins in the connectors. Don’t forget to check the possible causes listed above for a comprehensive solution.

How can I visually inspect the wiring harness and connectors to fix the p1149 fault code?

If you’re dealing with the p1149 fault code and your engine light is on, it’s time to take action. The culprit could be a faulty Air/Fuel Ratio Sensor 1 or issues with the sensor’s wiring harness and connectors. To fix this, visually inspect the wiring harness and connectors for any signs of damage or poor electrical connections. Look out for broken, bent, pushed out, or corroded pins on the connectors. Don’t delay, get to the bottom of this issue and ensure your engine runs smoothly.

What should I look for when checking for damaged components and connector’s pins to resolve the p1149 fault code?

When resolving the p1149 fault code, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins. This can help identify any issues with the Air/Fuel Ratio Sensor 1 or its circuit. By thoroughly examining these areas, you can pinpoint the cause of the fault code and take the necessary steps to fix it.

p1149 error fault code explained

If your engine light is on, it could be due to a faulty AirFuel Ratio Sensor 1 or issues with the sensor’s wiring. To fix this, visually inspect the wiring harness and connectors for any damage. Check for broken, bent, pushed out, or corroded pins on the connectors.

Scroll to Top