After replacing battery airbag light turns on and off

Hi T.D. Did you have to jump start the car with the old battery? Or it cranked slow and your voltmeter showed low volts? Was charging system checked when new battery was installed? The reason I ask is overcharging can really affect electrical systems. You should definitely check charging and if that is okay, then have it scanned for codes on your airbag.

Need to know battery volts amount while it is running. Charging systems are important for cars. You want about a volt more than battery volts while it runs. And want to make sure its not overcharging cause it tends to jack things up. Around 14 volts is good. You definitely don't want more than 14.5 volts. Also, sometimes the volts don't increase quite that high, but you do need an increase in volts every time the motor runs. If the charging volts are okay, you can try to clear the code by disconnecting and leaving the battery unconnected for about five minutes. Sometimes they clear. But make sure the charging is okay first. And if you see that air bag light when you know it shouldn't be illuminated, have it checked for codes.

Hey TD, if you find out the airbag does have a problem and want to go through repairing the system yourself. I can help you do that. Just borrow a scanner, get the code number and i'll post the chart for that code. Repairs vary, it could be a sensor, a module or the bag itself. We'd have to see what chart needs to be done.

Have you seen what codes are in air bag system and the charging volts?

All cars are difficult cars to own at one point or another. Can I ask if you moved the car when the battery was dead? Long story short to you turn the wheel and move the car with the engine running?

It is probably your clock spring they go out all the time, but to be sure lets check out this video which shows us how to run the codes:

https://youtu.be/gnSGfEqrf_w

This guide will walk you through the repair if it is the clockspring

https://www.2carpros.com/articles/steering-wheel-clock-spring-removal

Please run down this guide and report back.

The under seat connections are for the airbag occupant detection. They simply tell the system if someone is in the seat, and if they are over a set weight it also sets the level that the air bag deploys at. So say a fifty pound child sets there the SRS will deploy the bag at a lower level than if a 200 pound adult is in the seat.

Because this started after a low battery was replaced and this is a Peugeot my first suspicion would be the airbag control module itself. They have a supplemental power source inside them in the event the main battery gets cut off during an accident. It's designed to only supply power for a short time. When the main battery gets low it can drain that internal unit, then when full power is restored with the new battery it doesn't re-charge the internal supply but instead damages the module.

For the problem you have with that code you need to find a shop that can fully scan the systems in it. That will likely require a dealer scan system as many euro vehicles use different connections for diagnostics on the restraint systems. The catch is that it will need to be scanned while the light is on, this is because the SRS system is a constant monitor system. It watches all the parts all the time. If it's something like a broken wire or a bad connection and it "fixes" itself and the light goes out, it may not show a code as the system thinks it is working fine. It will not show an active code and instead may show it as a memory code. That can be hard to find without the high end scan tool.

Please let us know what you find. We are interested to see what it is.

Sounds good let me know, have a good weekend.