P0606 on TOYOTA COROLLA — Control Module Processor

Q: "What does P0606 mean on a TOYOTA COROLLA?"

"P0606 indicates: Control Module Processor. This is a computer and output circuits code. 2 TOYOTA COROLLA owners have reported this to NHTSA."

Q: "What are the most common causes of P0606 on TOYOTA COROLLA?"

"Based on 2 NHTSA reports, the most commonly cited components are: Electrical System, Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0606 serious on my TOYOTA COROLLA?"

"Of 2 NHTSA reports for this code on TOYOTA COROLLA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my TOYOTA COROLLA shows P0606?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0606 Means on Your TOYOTA COROLLA

P0606 is a diagnostic trouble code indicating: Control Module Processor. This code relates to the computer and output circuits system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 TOYOTA COROLLA owners have reported this issue to NHTSA across model years 2005-2011. Most reports come from the 2005, 2011 model years. The most commonly reported component is Electrical System (50.0% of reports).

Real TOYOTA COROLLA Owner Reports

Source: NHTSA Complaints Database

"2005 toyota corolla. 3/1/2010-engine cuts out/stalls while driving and check engine light. retrieved codes p0606 and p0456. brought to local service and was diagnosed as ecm failure. service rep states that it has to go to toyota because ecm is on technical service bulletin extended warranty."

— 2005 TOYOTA COROLLA owner · ELECTRICAL SYSTEM · Filed 03/01/2010

"Vehicle fails to start. found codes p0606 (ecm/pcm processor error) and p0303 (random misfire) on obd 2 computer. vehicle towed to toyota dealership where they cleaned spark plugs and cylinders due to engine flooding."

— 2011 TOYOTA COROLLA owner · VEHICLE SPEED CONTROL,ENGINE · Filed 11/04/2013

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'05

1

'11

Common Causes on TOYOTA COROLLA

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM 50%

VEHICLE SPEED CONTROL,ENGINE 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0606 mean on a TOYOTA COROLLA? ▾

P0606 indicates: Control Module Processor. This is a computer and output circuits code. 2 TOYOTA COROLLA owners have reported this to NHTSA.

What are the most common causes of P0606 on TOYOTA COROLLA? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Electrical System, Vehicle Speed Control,Engine. These percentages are based on the component field in owner complaints.

Is P0606 serious on my TOYOTA COROLLA? ▾

Of 2 NHTSA reports for this code on TOYOTA COROLLA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my TOYOTA COROLLA shows P0606? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P0606 on Other Vehicles

→ All codes reported on TOYOTA COROLLA