What does the OBDII trouble code p0446 mean?
P0446 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing (Sierra or not). The code technically stands for: Evaporative Emission Control System Vent Control Circuit Malfunction
What to do if your Sierra has p0446?
Here are the most common Sierra P0446 fixes: Of all the items listed above, it would be wise to start with the gas cap and work your way to the fuel tank, since the gas cap is far and away the easiest and least expensive items to replace on here. Here’s a great video on how to test your gas cap.
What does the Check Engine Light code p0101 mean?
The mass air flow (MAF) sensor measures the amount of air entering the engine. Check engine light code P0101 is set when the measurement of air entering the engine by the mass air flow sensor is outside of the manufacturer’s specified range.
What happens when code p0106 is triggered?
When Code P0106 is triggered, it is important that you address the problem as soon as possible. An issue with your MAP sensor can lead to noticeable engine problems, increased blow back smoke, and a lack of fuel efficiency. This is because your MAP isn’t communicating properly with your Throttle Position Sensor (TPS) or your PCM.
What are the symptoms of a p0146 DTC?
Symptoms of a P0146 DTC may include: MIL (Malfunction Indicator Lamp) on Potential causes of an P0146 code include: Bad Bank 1, position 3, o2 sensor Wiring problem, melted harness, broken connectors, etc. 1. Start the engine and allow it to reach operating temperature.
What does the OBD-II code p0147 mean?
P0147 is the OBD-II generic code indicating the Engine Control Module (ECM) has tested the O2 sensor heater circuit during startup and detects problems with the bank 1 sensor 3 O2 sensor heater circuit. What causes the P0147 code? The ECM tests the O2 sensor heater circuits at startup for excessive current draw, opens, or shorts.
What causes the p0446 code to come back?
P0446 tends to be returned by diagnostic testing when the control circuit for the evap vent valve is not achieving the seal that enables the EVAP system in the vehicle to hold pressure. The evap vent valve in most makes and models depends on a supply of a 12V battery voltage with key on.
What are the causes of the code p0106?
What Causes Code P0106? 1 Faulty MAP sensor 2 Faulty MAP sensor wiring 3 Leaks in air intake system 4 Open/Short in wiring for MAP sensor 5 MAP sensor affected by water or dirt