P0646 Engine Trouble Code
When you check engine light came on code P0646 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 P0646 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
P0646 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.
P0646 Code Meaning :
|OBD-II Diagnostic Powertrain (P) Trouble Code For Engine||Intake Valve Control Solenoid Circuit Low||O2 Sensor Heater Circuit Malfunction||Engine Shutoff Solenoid Malfunction||Reverse Input Circuit|
Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.
P0646 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP0646 OBD-II Trouble Code A/C clutch relay may also be referred to as A/C compressor clutch relay. A/C clutch relay circuit is monitored when ignition is on and battery voltage is greater than 10.4 volts. P0646 code.
Reason For P0646 CodeThe reason of P0646 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.
P0646 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.