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Jared D
Jared D, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1346
Experience:  Shop Supervisor at County Fleet
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I have the codes c0899 and c0900 and p0430 on my 2007

Customer Question

I have the codes c0899 and c0900 and p0430 on my 2007 chevrolet tahoe ltz.
Background: I recently replaced my evap canister and purge valve and cleared codes associated with that. Those codes have not come back on since and I believe it was p0455 etc.
Then my transmission was replaced and 2 days after I got the 3 codes c0899, c0900(history) and p0430 pending and p0430 confirmed.
I'm finding little info on codes c0900 and c0899
Could you help out?
Submitted: 11 months ago.
Category: Chevy
Expert:  Jared D replied 11 months ago.

The C0900 is a strange code to keep getting. We usually see it when there is a battery voltage issue that isn't a real problem, usually a short or a result of a jump start.

If it keeps coming on it could be an overcharging alternator.

Here is the diagnostic sheet on the code:

Expert:  Jared D replied 11 months ago.

The p0899 is another electrical code, and the only thing I've ever seen this one set for is the brake light switch. It's a possibility that it is what is causing yours to come on. You could test the switch with a scan tool or a multi-meter.

This code could also be a result of a bad ground to the brake control module, which would also explain the c0900 code because it could illuminate from a bad ground to the brake module as well.

Maybe that's a good place to start.

Do you hope to fix it yourself?

Expert:  Jared D replied 11 months ago.

This is the ground that the EBCM uses.

Expert:  Jared D replied 11 months ago.

I just wanted to see if you need any additional assistance.

If you are ready, please don't forget to rate. They don't pay us if we don't get a positive rating.

Expert:  Jared D replied 10 months ago.

I just wanted to check whether you need any additional info.

If you no longer have any questions please don't forget to rate.

Expert:  Jared D replied 10 months ago.

Please don't forget to rate. We don't get paid if we don't get a positive rating.