HO2S Heater Control Circuit Low Bank 1 Sensor2
symptoms
Other than the MIL light illuminating you may not notice any performance issues.
cause
A short in the O2 sensor heater circuit or the sensor itself
A faulty O2 sensor heater
Wiring or connectors are broken or frayed to the sensor or relay
Bad PCM or ECM
The fix
Correct wiring short or loose connector found in inspection.
and/or
Replace the bank 1 sensor 2, O2 sensor
Replace PCM if circuit has failed and no wiring issues present, good O2 sensor
Check engine is an error. You have to go at a garage to see what is the error code, then correct the problem.
With a scan tool.
Pretty simple connect an obd2 scanner and it will pull the error codes for the check engine light then look up the error code and diagnose and fix your problem
The computer doesn't allow to start the engine. Check the error code.
ANY error code in the computer.
You need to check your engine. The computer has detected a problem with the engine management system and the light is letting you know that is has error codes stored.
The check engine light error code PO172 means that the system is too rich. The reason why the system is to rich is due to the mass air flow sensor being dirty or faulty.
Some of hoses will make for sure the check engine light come on. It depends on the house. If you are sure that it was the hose reset the computer and check your assumption. If you have access to an error code reader check the error code, it might simplify your life.
That is the check engine light.That is the check engine light.
Number 2 cylinder is misfiring.
P0470 is Exhaust back pressure sensor malfunction.
No, oil level does not cause the check engine light.