Engine-CodesAcura – P1167 Acura

P1167 Acura Code - Air/Fuel Ratio Sensor 1 Heater System Malfunction

Quick Answer

The P1167 code in an Acura vehicle indicates a malfunction in the Air/Fuel Ratio Sensor 1 Heater System. Common causes include Faulty air/fuel ratio sensor, Damaged heater circuit in the sensor, Wiring issues. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1167 Acura indicates Air/Fuel Ratio Sensor 1 Heater System Malfunction.
Common causes
Common causes include Faulty air/fuel ratio sensor, Damaged heater circuit in the sensor, Wiring issues.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1167 Acura Description

The P1167 code in an Acura vehicle indicates a malfunction in the Air/Fuel Ratio Sensor 1 Heater System. This sensor is responsible for monitoring the amount of oxygen in the exhaust gases and adjusting the air-fuel mixture accordingly. The heater system within the sensor ensures that it operates optimally even in cold conditions, allowing for accurate readings to be sent to the engine control module.

OBDII Code P1167 Acura - Air/Fuel Ratio Sensor 1 Heater System Malfunction
P1167 Acura Code - Air/Fuel Ratio Sensor 1 Heater System Malfunction

Common Causes of P1167 Acura

  1. Faulty air/fuel ratio sensor
  2. Damaged heater circuit in the sensor
  3. Wiring issues
  4. Engine control module malfunction

Symptoms of P1167 Acura

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Hesitation during acceleration
  4. Check Engine Light illuminated

How to Fix P1167 Acura

  1. Begin by diagnosing the specific cause of the code using a scan tool to read the live data from the air/fuel ratio sensor.
  2. Inspect the wiring and connectors associated with the sensor for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the air/fuel ratio sensor and its heater circuit using a multimeter to verify functionality. Replace the sensor if it fails the test.
  4. Clear the diagnostic trouble codes from the engine control module and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1167 Acura

The typical repair costs for addressing a P1167 code in an Acura can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, factors such as location, vehicle make and model, and engine type can influence the final cost of the repair.

When is the Code Detected?

If the element is not activated or the Engine Control Module (ECM) terminal voltage is a set value or less for at least a set time period when the power is drawn to the A/F sensor (sensor 1) heater, a malfunction is detected and the code is stored.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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