Engine code
P0606: Engine computer processor fault
How much to fix P0606? Typically $410–$2,250.
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 | $250 | $1,500 |
| Labor: 1.5 to 4 hours × $110 to $150 an hour | $165 | $600 |
| Fees: shop supplies, disposal, diagnostics | $0 | $150 |
| Total, rounded | $410 | $2,250 |
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, ecu / engine control module replacement. Which repair your car needs depends on a proper diagnosis.
The engine computer runs checks on itself, and it flagged a fault in its own processor. That can mean the computer has failed, but weak power, a bad ground or water damage can cause the same code. It is worth testing the battery and grounds before ordering a computer.
- Safe to drive?
- No, get it looked at first
- Most common cause
- Failed engine computer
Behavior can be unpredictable. It may stall or go into limp mode, so avoid driving until diagnosed.
Get quotes from local shops
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What you may notice
- Stalling
- No start
- Erratic shifting
- Check-engine light
Common causes, most likely first
- Failed engine computer
- Poor power or ground to the computer
- Corroded connector
- Water damage
Check this first
Have the battery tested and the engine and body ground straps checked for corrosion before replacing the computer. A weak battery or a loose ground can cause false processor codes, and fixing them costs far less.
Other repairs that sometimes fix P0606
| Repair | Typical range, US |
|---|---|
| CAN bus wiring repair | $170 to $1,125 |
| Battery replacement | $150 to $470 |
| 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).
P0606 questions
Is a computer replacement always needed?
Not always. Bad grounds or a weak battery can mimic it. A shop should test those first, because a new computer is one of the more expensive parts and may need programming.
Does a new computer need programming?
Yes, usually. It has to be matched to your VIN and sometimes to your keys, which takes a scan tool or a dealer-level tool. Ask whether the price includes programming.
Can it be repaired?
Some specialty shops repair them for less than the cost of a new unit. Ask your shop about that, and check the warranty and turnaround time, since you may be without the car while it is away.
How much does it cost to fix P0606?
The most common fix, ecu / engine control module replacement, has a typical range of $410 to $2,250 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 | $430 to $2,350 |
| New York City area | $430 to $2,325 |
| Los Angeles area, California | $430 to $2,350 |
| Chicago area, Illinois | $420 to $2,275 |
| Houston area, Texas | $400 to $2,250 |
| Dallas-Fort Worth area, Texas | $400 to $2,250 |
| Phoenix area, Arizona | $410 to $2,250 |
| Atlanta area, Georgia | $420 to $2,275 |
| Miami area, Florida | $400 to $2,250 |
| Seattle area, Washington | $430 to $2,350 |
Related codes
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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.