Honda P0155-Air/Fuel Ratio Sensor Heater Circuit Malfunction

Honda P0155 Air/Fuel Ratio Sensor (A/F) Sensor Bank 2 Sensor 1 Heater Circuit Malfunction

Code P0155 Honda is DTC code indicating problem with air/fuel ratio sensor Bank 2 Sensor 1 in the exhaust system. The air/fuel sensor measures the amount of oxygen present in exhaust gas and sends signal to ECM(engine control module) to help it adjust air/fuel ratio for maximum engine performance and emission control. This code triggered when engine control module receives signal from air/fuel ratio sensor when not working within expected range.

Fault Location- Air/Fuel (A/F) Sensor Bank 2 Sensor 1

Possible Causes Code P0155 Honda

1.Failed air/fuel ratio sensor can cause the engine control module to receive incorrect reading.

2.Damaged or corroded wiring or connector of air/fuel ratio sensor can prevent signal from being properly transmitted triggering p0155.

3.Leak in exhaust system either upstream or downstream of air/fuel ratio sensor can cause incorrect reading being sent to ECM triggering p0155.

4.Clogged fuel filter or failing fuel pump can lead fuel delivery problem causing incorrect air/fuel mixture to be delivered to engine affecting sensor reading and triggering this code.

5.Vacuum leaks in engine can cause incorrect air/fuel mixture affecting sensor reading and triggering this code.

6.In few cases faulty ECM can cause p0155.

Honda P0155 Possible Symptoms

1.Faulty air/fuel ratio sensor can cause engine to run less efficiently resulting in reduce fuel economy.

2.Faulty air/fuel ratio sensor can cause engine to run rough or idle poorly and can cause lack of power during acceleration.

3.Vehicle fails emissions test.

4.Faulty air/fuel ratio sensor can cause engine to run rough or have irregular idle.

5.Engine check light illumination is most common symptoms of p0155.

How To Fix Code P0155 Honda

1.Inspect wiring and connector of air/fuel ratio sensor circuit for damaged, corrosion or loose connections. If any issues found repair or replace affected or damaged components.

2.If air/fuel ratio sensor found faulty replace it with new one.

3.Any leaks in exhaust system need repairing to prevent incorrect reading.

4.Check fuel system for clogged fuel filter or malfunctioning fuel pump that could be affecting air/fuel mixture ratio.

5.If ECM found malfunctioning replaced ECM.

Notice

Its important to have the vehicle inspected and diagnosed by professional mechanic to find and resolve issue related with p0155 for proper repair.

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