C0900 Code - Device Voltage Malfunction
Quick Answer
The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Battery voltage, Faulty Control Module, Control Module harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C0900 indicates Device Voltage Malfunction.
- Common causes
- Common causes include Battery voltage, Faulty Control Module, Control Module harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C0900 Description
What are the Possible Causes of the DTC C0900?
- Battery voltage
- Faulty Control Module
- Control Module harness is open or shorted
- Control Module circuit poor electrical connection
How to Fix the DTC C0900?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
- C0900 07: Control Module Power Circuit High Voltage
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C0900 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the C0900 code?
Need more information on how to fix the C0900 code? Get Access to Factory Service Manuals
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Information for Specific Makes
- C0900 Buick — Device Voltage Malfunction
- C0900 Cadillac — Device Voltage Malfunction
- C0900 Chevrolet — Device Voltage Malfunction
- C0900 GMC — Device Voltage Malfunction
- C0900 Saturn — Device Voltage Malfunction
Frequently Asked Questions about C0900 Code
1. What does OBDII code C0900 mean?
C0900 is a manufacturer-specific code indicating a Device Voltage Malfunction, meaning a control module is detecting improper or unstable voltage levels.
2. What are the common symptoms of code C0900?
Symptoms may include warning lights on the dashboard, erratic electrical system behavior, or failure of specific vehicle components like sensors or modules.
3. What causes code C0900 to appear?
Common causes include a weak or failing battery, a malfunctioning alternator, poor electrical connections, or damaged wiring.
4. Can code C0900 be caused by a dead battery?
Yes, a dead or weak battery can cause this code by providing insufficient voltage to the system.
5. How do I diagnose code C0900?
Start by checking the battery voltage, inspecting the alternator, and examining wiring and connections for damage or corrosion.
6. Can a loose ground connection trigger code C0900?
Yes, a loose or corroded ground connection can result in unstable voltage and trigger this code.
7. Is it safe to drive with code C0900?
It may be safe for short distances, but prolonged driving with electrical issues can lead to further component failures.
8. How do I fix OBDII code C0900?
Repairs may include replacing a faulty battery, repairing or replacing damaged wiring, cleaning corroded connections, or replacing a failing alternator.
9. Will disconnecting the battery clear code C0900?
Disconnecting the battery may temporarily clear the code, but the underlying problem must be resolved to prevent it from returning.
10. Can extreme weather cause code C0900?
Yes, extreme cold or heat can affect battery performance and electrical connections, potentially triggering this code.
Discuss the causes and fixes for C0900 OBDII Code
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Is there a fee or charge for this info?
IF NOT.. Do the codes c0899 and c0900 have to do with the airbags system on a 2007 silverado? -
The information is free.
According to the factory service manual the C0899 and C0900 codes are not related to the airbag system.
I haven't had that problem before, but I checked a database of repairs for the same codes on a 07 Silverado and found a couple of instances where the problem was with the alternator not properly charging the battery. Replacing the alternator fixed the problem.
I suggest starting by checking the alternator charge.
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