Canusa Automotive Warehouse

How to Easily Eliminate MAFS Warranty Problems

HOW TO EASILY DIAGNOSE MAFS WARRANTY PROBLEM

1. Identify the Key Symptoms of MAF sensor Failure
• Loss of engine power
• Erratic engine idle speeds
• Rough idle or engine surging
• Engine stalling problems
• Check engine light is on
2. Obtain the trouble codes from the vehicle’s computer.
Use a scan tool or “check engine light” to read the codes.
3. Check codes that indicate the MAF sensor is suspect.
GM Codes 33, 34, or 36 Ford Code 26, 56, 66, or 76
4. Determine location of MAF sensor.
MAF sensors are located in the engine’s air intake duct after the air cleaner.
5. Test MAF sensor.
Tap MAF sensor while the engine is running. If one of the
symptoms above occurs, the MAF sensor is defective.
6. Test MAF sensor wiring.
Wiggle wire harness while the engine is running.
If one of the symptoms above occurs, problem is in MAF sensor wiring.
7. Remove MAF sensor from car.
Check the wire harness and connector for broken wires.
8. Check air ducts for damage or cracks.
In order to operate properly, there
cannot be any air leaks.
Note:
Always remove mounting clamps and o-rings
from the defective MAF sensor. These parts will be
used to install the new MAF sensor.
AVOID FUTURE WARRANTY PROBLEMS
• Always use the installation instructions supplied with every MAF sensor.
Failure to follow instructions will void the warranty.
• Make sure all trouble codes are repaired.
In addition to bad MAF sensor codes, you could also have other defective sensors.
• Eliminate engine mis ring or back ring before installing a new MAF sensor.
An engine back re can damage a new MAF sensor.
• Check engine wire harnesses and connectors for corrosion or damage.
Wiggle the wire cables while car is running to see if a symptom listed above occurs.

 

 

HOW TO EASILY DIAGNOSE MAFS WARRANTY PROBLEMS

1. 

Identify the Key Symptoms of MAF sensor Failure

 

• Loss of engine power

 

• Erratic engine idle speeds

 

• Rough idle or engine surging

 

• Engine stalling problems

 

• Check engine light is on

 

2.

Obtain the trouble codes from the vehicle’s computer. Use a scan tool or “check engine light” to read the codes.

3.

Check codes that indicate the MAF sensor is suspect. GM Codes 33, 34, or 36 Ford Code 26, 56, 66, or 76

4.

Determine location of MAF sensor. MAF sensors are located in the engine’s air intake duct after the air cleaner.

 

5.

Test MAF sensor. Tap MAF sensor while the engine is running. If one of the symptoms above occurs, the MAF sensor is defective.

6.

Test MAF sensor wiring. Wiggle wire harness while the engine is running. If one of the symptoms above occurs, problem is in MAF sensor wiring.

7.

Remove MAF sensor from car. Check the wire harness and connector for broken wires.

8.

Check air ducts for damage or cracks. In order to operate properly, there cannot be any air leaks.

   

Note: Always remove mounting clamps and o-rings from the defective MAF sensor. These parts will be used to install the new MAF sensor.

 

 


AVOID FUTURE WARRANTY PROBLEMS

  •

Always use the installation instructions supplied with every MAF sensor.
Failure to follow instructions will void the warranty.

  •

Make sure all trouble codes are repaired.
In addition to bad MAF sensor codes, you could also have other defective sensors.

  •

Eliminate engine misfiring or backfiring before installing a new MAF sensor.
An engine backfire can damage a new MAF sensor.

  •

Check engine wire harnesses and connectors for corrosion or damage.
Wiggle the wire cables while car is running to see if a symptom listed above occurs.