EV and hybrid code
P0A94: DC/DC converter performance problem
How much to fix P0A94? Typically $1,000–$4,350.
Wide range: this job varies a lot. Itemize your quote for a better answer.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $800 | $3,500 |
| Labor: 2 to 5 hours × $110 to $150 an hour | $220 | $750 |
| Fees: shop supplies, disposal, diagnostics | $0 | $100 |
| Total, rounded | $1,000 | $4,350 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
This is the range for the most common fix, hybrid inverter / converter repair. Which repair your car needs depends on a proper diagnosis.
The DC/DC converter steps the high-voltage battery power down to charge the small 12-volt battery and run the car's lights and electronics. This code says the converter is not doing that job well. It is the usual meaning, but it varies by make, so check the scan tool or manual.
- Safe to drive?
- Short trips only
- Most common cause
- Failing DC/DC converter
The 12-volt battery may drain and the car can shut down. Stop driving if the car goes into limp mode, shows a red warning, loses power, or you smell something burning. Call a tow rather than keep driving.
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What you may notice
- Hybrid warning light on
- 12-volt battery warning
- Dim lights
- Car won't ready
Common causes, most likely first
- Failing DC/DC converter
- Weak 12-volt battery
- Cooling problem in the inverter
- Bad connection
- Inverter fault
Check this first
Test the 12-volt battery first. A weak 12-volt battery causes many strange hybrid problems.
Other repairs that sometimes fix P0A94
| Repair | Typical range, US |
|---|---|
| Battery replacement | $150 to $470 |
| EV battery coolant service / pump | $180 to $1,225 |
| Diagnostic scan (check engine light) | $55 to $250 |
Before you pay
- Ask the shop what test showed this part is the cause, not just that the code appeared.
- Ask for parts and labor listed separately, and for the hours.
- Ask for a written OK before any extra work. Many states require written authorization before repairs.
Got a quote already? Check it against the range. Want to see if your car has a recall tied to this problem? Check recalls by VIN.
Need to read a code yourself? OBD-II scanners on eBay (affiliate link, disclosure).
P0A94 questions
Is the converter the same as the inverter?
On many hybrids it is built into the same unit, so a converter problem can mean work on the inverter assembly. Ask the shop whether your car has one box or two before you compare prices.
Why is the 12-volt battery dying?
The converter is what keeps it charged while the car runs. If the converter is weak, the 12-volt battery slowly drains, and eventually the car will not go into ready mode.
Can I jump it?
You can jump the 12-volt battery, but use the jump points marked in your manual and avoid touching orange cables. After jumping, have the converter tested so the problem does not repeat.
How much does it cost to fix P0A94?
The most common fix, hybrid inverter / converter repair, has a typical range of $1,000 to $4,350 across the US. It is an estimate built from parts prices and local labor wages, not a quote. Your car and shop change it.
Typical range in 10 metro areas
Only the labor rate changes between cities. Same parts, same hours.
| Area | Typical range, estimate |
|---|---|
| Boston area, Massachusetts | $1,050 to $4,475 |
| New York City area | $1,025 to $4,425 |
| Los Angeles area, California | $1,025 to $4,450 |
| Chicago area, Illinois | $1,025 to $4,375 |
| Houston area, Texas | $1,000 to $4,325 |
| Dallas-Fort Worth area, Texas | $1,000 to $4,325 |
| Phoenix area, Arizona | $1,000 to $4,350 |
| Atlanta area, Georgia | $1,025 to $4,375 |
| Miami area, Florida | $1,000 to $4,350 |
| Seattle area, Washington | $1,050 to $4,450 |
Related codes
- P0A93: Inverter cooling system problem
- P0A78: Drive motor inverter performance problem
- P0AFA: Hybrid battery voltage low
More ev and hybrid codes
Code meaning written in our own words. Some codes mean different things on different makes, so check your scan tool or manual. Not a repair shop, estimates only.