This thing I driving me crazy and I'm almost ready to give up. I have spent soooo much in the last few months I probably could of taken my wife on a cruise for a week. The airbag light came on so I changed out the front impact sensors with he correct Dorman units as stated on their website (590-215). The light is still on. Am I missing something? Do they need to be calibrated? I took it to the shop and thy told me the front impact sensors need changed. They are 2 weeks old. Can they be defective? Does anyone have an idea?

 

I need to replace mine and the last time i went to the stealership the tech told me i could replace both myself and bring it in again so he could reset it . Had you been to the dealer and try to See what they say ????

 

Try disconnecting the battery and let it reset.

 

Still working on this. I have spent another $550 and the light is still on. Spent a day at the dealer and they told me the new Dorman sensors I put in were bad. The service manager gave me the correct GM part number that I need and I purchased 2 new GM sensors. The light is still on. From what they told me the airbag system resets itself every time it gets started. I disconnected the battery for 5 minutes, nothing. Changed the sensors twice, nothing. Tried having the computer system reset, nothing. Had the dealer check every wire in the system, nothing. I am going to try taking it to a specialist next and see if that works.

On another note.... I think someone makes the sensors for GM and Dorman because they are exactly the same. I can not tell any difference in them at all. Even the markings on the sensor are the same. $150 GM, $80 Dorman

 

I hope it's not the same problem as my Avalanche had. There is a contact that is made up in the steering column by a spring. It is located behind the air bag. There are some threads on the net. The dealership would probably try to sell you an airbag next. You've got a doozy here. I never fixed my avalanche, I sold it and bought the deuce. But same steering column so I hope i don't go thru it again. GL. Let us know.

 

Hi, new here, same issues the OP had, reviving this thread to see if a solution was found.
2006 H2, front sensors replaced, swapped locations twice and the same B0100 driver’s side sensor fault comes back, took airbag module from under driver’s seat out and it’s clean, no major nastiness, some corrosion but nothing much, cleaned connectors with electronic cleaner, no idea where the ground cable is for this unit. Same code and airbag service light on, plugs at the connectors look ok, don’t know how to proceed.. anyone had this issue corrected?

 

Swap EFS-LF & RF, if code changes, replace the sensor, if doesn't change, check connector/wiring.
DTC B0100 for the EFS-LF or B0103 for the EFS-RF
If DTC B0100 is current, disconnect the inflatable restraint electronic frontal sensor (EFS) - LF connector. If DTC B0103 is current,disconnect the EFS-RF connector. The EFS is also known as the inflatable restraint front end discriminating sensor. Inspect both the component and harness sides of the connector for damage or corrosion. If the component side of the EFS connector is damaged, the EFS must be replaced. If the harness side of the EFS connector is damaged, replace the harness side of the connector.

 

Thanks for the quick reply!

The code is always the same, B0100, even after replacing driver’s side sensor with a new one, and then swapping the sensors to see if code follows it.

So I guess I’m dealing with a harness issue here, and by the looks of it the plug looks fine and the cables are properly attached to it.
Any areas that I should be looking for chuffed wires? Should I just replace the plug first? Where do I get that plug? Any links?
When I get home today I’ll check the plug again for obvious disconnection but from what I checked yesterday all seems ok.
Any chances the issue is internal to the Airbag Module under driver’s seat?

Thanks again @hummerz !

 

DTC B0100, B0101, B0102, B0103, B0104, OR B0105

The inflatable restraint electronic frontal sensor (EFS) utilizes a unidirectional 2-wire circuit. The EFS
modulates current on the interface to send ID, State of Health, and deployment commands to the inflatable
restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for the EFS.
When the ignition is turned on and input power from the SDM is first detected, the EFS responds by performing
internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time
is less than 5 seconds. The EFS continually communicates status messages to the SDM, which determines if a fault is present in the EFS circuit. When a fault is detected, the SDM may reset the EFS up to two times by
removing and reapplying power to it. If the fault is still present, the SDM will set a diagnostic trouble code
(DTC). DTC B0100 for the EFS-LF or B0103 for the EFS-RF will set when one of the following conditions
occur:

A valid ID message is not received within 5 seconds of the EFS being powered up.

A status message is not received.

The SDM has reset the EFS twice without detecting a valid ID message.

The following are conditions that may cause the malfunction:

A short to ground or voltage in the EFS circuit

High or low resistance in the EFS circuit

Improper EFS installed on vehicle

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and connectors may
result in misdiagnosis, causing a part replacement with the reappearance of the malfunction.

Test Description

Tests the EFS signal and EFS voltage circuits for an open or high resistance

Tests between the EFS signal and EFS voltage circuits for continuity

Tests the EFS signal and EFS voltage circuits for a short to voltage

Test both the EFS signal and EFS voltage circuits for an open or high resistance between the SDM connector and the EFS connector.

 

Btw, make sure to always use electronic cleaner on connectors/contacts!