P1162 Error Code: Air/Fuel Ratio Sensor 1 Circuit Malfunction
What is the P1162 Error Code?
The P1162 error code is defined by the OBD system as “Air/Fuel Ratio Sensor 1 Circuit Malfunction.” This code indicates a malfunction in the circuit of the air/fuel ratio sensor 1 and usually suggests a problem with the sensor itself.
Causes of the P1162 Error Code
Possible causes of this error code include:
- The air/fuel ratio sensor 1 may be faulty.
- There may be an open or short circuit in the wiring of sensor 1.
- The electrical connection in the circuit of sensor 1 may be weak or loose.
How to Fix the P1162 Error Code
To resolve the P1162 error code, you should:
- Carefully check the listed “Possible Causes.” Visually inspect the related wiring harness and connectors for any signs of damage, breaks, or wear.
- Examine any damaged components. Look for potential problems such as broken, bent, pushed-out, or corroded connector pins.
Estimated Cost for P1162 Error Code Repair
Estimated Labor Time: 1.0 hour
The average labor cost for diagnosing and repairing the P1162 code is typically based on about one hour of work. The hourly rate can vary depending on location and vehicle make/model, usually ranging from $75 to $150 per hour.
When is the P1162 Code Detected?
This code is stored when the Engine Control Module (ECM) detects that the air/fuel ratio sensor is not active, or the voltage at the ECM terminal, when pulled to power the A/F sensor 1, remains below a certain level within a specified time frame.
Effects and Meaning of the P1162 Error Code
The P1162 code means there is a circuit malfunction in Air/Fuel Ratio Sensor 1. This sensor, located in the vehicle’s exhaust system, measures the oxygen level in the exhaust gases and sends this data to the Engine Control Module (ECM). A built-in heater in the sensor helps it perform accurate measurements quickly. Voltage applied to the electrodes allows the sensor to detect oxygen concentration, and the resulting current indicates the air/fuel ratio.
Symptoms of the P1162 Error Code
When this error code is triggered, you may notice the following symptoms:
- Check Engine Light (MIL) is on
- Rough engine operation
- Black smoke coming from the exhaust
- Difficulty starting or sudden engine stalling
- Various performance issues while driving
Root Causes of the P1162 Code
This code can result from several issues, including:
- Sensor malfunction due to dirt or contamination
- Physical damage or short circuit in the sensor
- Weak or disconnected sensor connections
- Air leaks in the intake system
Recommended Fixes for the P1162 Error Code
To address the issue:
- Thoroughly inspect Air/Fuel Ratio Sensor 1 and its connections. Look for signs of damage, corrosion, or looseness and tighten or repair as necessary.
- Check and replace the air filter if it is dirty or clogged.
- If a low voltage issue is present, inspect the sensor and wiring for faults.
- Visually check for leaks in the exhaust or intake systems.
P1162 Error Code Names by Manufacturer
- Acura, Honda: Air/Fuel Ratio Sensor 1 Circuit Malfunction
- Audi, Volkswagen: Intake Air Temperature Sensor Short to Ground
- BMW, MINI: Fuel Trim Additive Bank 1 Low
- Hyundai: High Pressure Fuel Pump and Line Issue
- Land Rover: LH Bank Lambda Control Adaptation Too Large
This information provides a solid starting point to understand the P1162 code and take action for repairs. If you notice any symptoms mentioned above in your vehicle, it is recommended to consult a professional mechanic or technician.
