What is code 41 tach input error?

[GNRick]

Check engine light came on and this is the error code. What should I do? Thanks!

 

[RUQWKNF]

Here is what it says on GNTTYPEs site.

CODE 41

Trouble Code 41 indicates that the Camshaft Sensor is not functioning properly.

The ignition module uses the Cam Sensor signal for timing the spark firing. The ignition module also passes this signal to the ECM to enable sequential fuel injection. The inability to properly determine engine position from the Cam Sensor will generate Code 41.

The engine will continue to run if the signal is lost from the sensor, however it will not restart after shut down. If the Cam signal from the ignition module to the ECM is lost while running, the ECM will switch to the simultaneous fuel injection mode. The engine can be re-started but will continue to run in the simultaneous mode as long as the fault is present.

The conditions for setting this code are:

* the engine is running, and
* the Cam Sensor signal is not received by the ECM in the last 1 second interval


Typical causes for this code include:

1) Loose or misadjusted Cam Sensor
2) Defective Cam Sensor-to-ECM connections
3) Defective ECM

Cam sensor installation and adjustment procedures call for very exact tolerances. It is for this reason that it is recommended that the service manual be consulted while performing any adjustment or replacement of the Camshaft Sensor.

Also, check the magnet inside the cap for signs of a crack by physically touching the magnet with your finger. I have seen them crack but not break off completely and cause issues. As well as the wiring to the cap start to degrade or come apart.

HTH

Patrick

 

[Just a Six??]

Take the plastic top off the cam sensor & make sure the wheel/ring is still in place & held down tight with the screw. If the tab on back is broken RJC sells a kit to fix it.

 

[GNRick]

The car started fine after I shut it off. I'll do the inspection and will let you know.

 

[GNRick]

Take the plastic top off the cam sensor & make sure the wheel/ring is still in place & held down tight with the screw. If the tab on back is broken RJC sells a kit to fix it.

I took the cap off and the screw was tight. I didn't see anything that looked like a tab. If anything fails, would it be the cap? I carry a spare in the trunk.

 

[RUQWKNF]

Did you take a look at the magnet carefully? Magnet is on the inside of the cap. Yes, if something fails (other than the bushing wearing out and causing a tapping/knocking noise) the cap will. Is it the original cap? If so, I would swap it out as a preventive maintenance item and see if it clears up the problem.

Patrick

 

[ckmm]

i have same thing on my scanmaster it shows code 41 the engine light come on for a wihle then goes off. but the car runs great . allways starts. switched ecm cleared the code it comes back then just goes away what to do should i switch cam sensor or just the cap

 

[GNRick]

i have same thing on my scanmaster it shows code 41 the engine light come on for a wihle then goes off. but the car runs great . allways starts. switched ecm cleared the code it comes back then just goes away what to do should i switch cam sensor or just the cap

I guess you should at least carry a spare cap with you!