P1605 Engine Error Code
When you check engine light came on code P1605 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P1605 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on your car models.
P1605 Code Symptoms
P1605 OBD2 may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.
Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.
P1605 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP1605 Keep Alive Memory Test Failure so you have to check ODB-II Engine Error Code list.
P1605 Code Review :The reason of P1605 OBD-II Engine Error Code is P1605 Keep Alive Memory Test Failure.
P1605 Code Dictionary Meaning:
p - Powertrain Code - Problem is related engine, transmission and emissions systems.
1 - MFG - Manufacturer Specific
6 - Vehicle Speed Control And Idle Control System
0 - Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
5 - Cruise Inhibit Control Circuit