2002 Silverado 4.3l wiring question, MAF sensor and water temp sensor throwing intermittent codes


Can a MAF sensor be intermittent?

Answer: This type of intermittent problem usually points to electrical faults. A sensor might not be able to send the correct signal when the fault is there. Check the circuit (wires, connector, harness) for those sensors the computer depends on to manage fuel, and ignition timing.

Can MAF sensor throw code?

A faulty MAF sensor can also trigger other codes, such as those pertaining to an air/fuel ratio imbalance or an engine misfire.

What else can cause a MAF sensor code?

One of the symptoms of a leaking intake gasket is the engine running rough when started cold. In vehicles with an oil-soaked aftermarket air filter, oil from the air filter can contaminate the MAF sensor element, causing the code P0101 or other MAF-related codes.

How do I reset my mass airflow sensor?

Upon replacing the Mass Air Flow Sensor, turn on the engine light to ensure it still has its function. You can unhook the battery and leave it unhooked for 10 minutes to completely reset the entire system. The battery will not harm itself if left unhooked for more than 10 minutes.

What should happen if I unplug MAF sensor?

Q: Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running. If you unplug the mass air flow sensor the car will start. If you try to plug it in while it’s running the car will die.

Will disconnecting battery reset MAF sensor?

Will Disconnecting Battery Reset Maf Sensor? Yes. The sensors on the battery will be reset after 15 to 30 minutes.

What does DTC code P0102 mean?

or Volume Air Flow Circuit Low Input

OBD-II Code P0102 is defined as a Mass or Volume Air Flow Circuit Low Input. The Mass Airflow Sensor (MAF) measures the amount of air entering the engine and the Engine Control Module (ECM) uses the information to determine the proper amount of fuel quantity and ignition timing.

Do you need to reset the ECU after replacing MAF sensor?

Having replaced the Mass Air Flow Sensor, the Engine Light may need to be switched on to ensure reliability. Unhooking the battery and leaving it unhooked for 10 minutes allows the system to be reset completely.

How do you test a MAF sensor?

Pop the hood open. Lightly tap the MAF sensor and electrical connector with a screwdriver handle. Wiggle the wires as well. If the engine stalls, idle is upset, or idle gets better, the MAF sensor is likely defective.

What should MAF be at idle?

It’s a good idea to test a MAF sensor before replacing it. Depending on the engine size, the MAF’s PID value can range from 2 to 7 grams/second (g/s) at idling and up to 25 g/s at 2500rpm.

How do you test a MAF sensor with a multimeter?

Next we get our multimeter. Turn it on and put our settings on twenty DC volts next we'll grab our black test lead and connected to battery. Ground. Make sure you get a good connection.

How do I know my MAF sensor is bad?

Six Signs My Car’s Mass Airflow Sensor (MAF) Is Bad

  1. Lean or Rich Fuel Mixture. …
  2. Difficulty Starting Your Car. …
  3. Engine Stalls After Starting or When Idling. …
  4. Engine Hesitation and Dragging. …
  5. Engine Hesitation and Jerking. …
  6. Engine Hiccups.

What is a normal MAF reading?

Depending on the engine size, the MAF’s PID value should be between 2 to 7 grams/second and between 15 to 25 grams/s at 2500rpm.