High Side Driver Fault
This code indicates a fault in the high-side driver for an electrical component.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Inside the vehicle's computer, there's a section that controls electrical parts like solenoids or motors. When it sees a problem, like a continuous high voltage output or a short circuit in a driver circuit, it sets this code to alert the technician.
What the computer is actually seeing
The computer monitors the voltage levels at the high-side driver circuit. If it reads a voltage above 12V for too long when it shouldn't, or there's an abnormal change, it triggers SPN 1676.
What a healthy reading looks like
The high-side driver should show voltages fluctuating between 0V (off) and up to battery voltage (12V+ when on); consistent readings over 12V when not active signal a problem.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors for damage or corrosion. Are any wires frayed or connections loose? (Yes: Repair or replace as needed; No: Move to next step.)
- 22. Check the voltage at the high-side driver. Is it above 12V with the component off? (Yes: Short or failure in driver; No: Move to next step.)
- 33. Test the component controlled by the high-side driver. Does it work properly when connected directly to a power source? (Yes: The circuit is fine; No: Replace the faulty component.)
- 44. If all tests are normal but the code persists, consider the high-side driver circuitry may be faulty. Replace the driver module.
Common causes
- Short to battery voltage in the wiring
- Faulty high-side driver circuit itself
- Failed connected component (like a solenoid)
- Damaged harness or connector
- Corroded connections in the circuit
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to diagnose and repair it soon. Depending on the component affected, it might cause drivability issues or even failure.
Why did this code appear suddenly?
It could be due to a wiring issue or a component failure that developed over time.
Does this code naturally go away?
If the underlying issue isn't fixed, the code will likely return after erasing it.
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