U1021 Engine Trouble Code
When you check engine light came on code U1021 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 U1021 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.
U1021 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.
U1021 Code Meaning :
|OBD-II Diagnostic Network (U) Trouble Code For Engine||Fuel And Air Metering||Crankshaft Position Sensor A Circuit Malfunction||Glow Plug/Heater Circuit 'A' Malfunction|
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.
U1021 OBD-II Diagnostic Network (U) Trouble Code DescriptionU1021 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.
Reason For U1021 CodeThe reason of U1021 OBD-II Engine Trouble Code is .
U1021 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.