P0606 OBD-II Trouble Code: PCM Processor Fault

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0606 code

P0606 is a diagnostic trouble code (DTC) for "PCM Processor Fault". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0606 DIAGNOSTIC Get a fair and transparent estimate upfront

P0606 code definition

PCM Processor Fault

What the P0606 code means

The Powertrain Control Module is sometimes referred to as the Power Control Module, or the Engine Control Module (ECM); all of these names mean the same thing. The PCM is responsible for monitoring every aspect of the vehicle’s engine and electrical system.

When the vehicle is started up, the PCM will perform a self-check to make sure that all of the engine’s components are operating properly. If the result of this self-check indicates that there is a processor fault in the the PCM, it will store the P0606 diagnostic trouble code.

What causes the P0606 code?

  • PCM wires that are broken, corroded, and/or frayed
  • PCM connectors that are broken, corroded, and/or frayed
  • Faulty PCM ground circuits and/or output devices
  • Faulty Controller Area Network (CAN) bus communication

What are the symptoms of the P0606 code?

  • Check Engine Light is on
  • Anti-lock brake (ABS) light is on
  • Vehicle may stall or shift improperly
  • Vehicle may die when coming to a stop
  • Vehicle may experience misfiring symptoms
  • Increase in fuel consumption
  • Although rare, there may be no felt symptoms

How does a mechanic diagnose the P0606 code?

  • Retrieves freeze frame data using an OBD-II scanner. Doing this will provide information as to when the code was set by the PCM, as well as what likely caused the code to be stored.

  • Visually inspects the wiring and connectors that lead to the PCM for breaks, frayed wiring, and corroded connectors.

  • Retests the system after repairing or replacing damaged wires or connectors. Most likely, the PCM will need to be replaced and/or reprogrammed.

  • Checks with the dealer to see if there are any recalls or if the PCM can be replaced under an emissions warranty.

Common mistakes when diagnosing the P0606 code

The P0606 diagnostic trouble code is difficult to misdiagnose; it is fairly straightforward, and is usually an indication that the PCM needs to be replaced and/or reprogrammed.

However, some of the symptoms are the same as symptoms that would be present for mechanical problems. As a result, it is common that ignition system and/or fuel system components are repaired in error.

How serious is the P0606 code?

The PCM monitors and controls the vehicle’s engine and electrical system. The vehicle will not be able to function without a PCM that is operating properly. For this reason, this code may very well be considered one of the most serious codes.

What repairs can fix the P0606 code?

  • Repairing or replacing any wires that are broken and/or frayed
  • Repairing or replacing any broken and/or corroded connectors
  • Repairing or replacing PCM ground circuits that are faulty
  • Replacing or reprogramming the PCM

Additional comments for consideration regarding the P0606 code

It is important to remember that symptoms of a faulty PCM can be the same symptoms of a faulty mechanical system. The P0606 diagnostic trouble code is simple and straightforward. However, replacing or reprogramming the PCM may need to be done at the dealership.

Need help with a P0505 code?

YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P0606

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0606 code.

SCHEDULE P0606 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


Related questions

What does it mean when the computer readout said p0606-engine control module/power train control module and p1680-power train mod
You will need to have the battery and charging system checked for a low voltage of 9 volts or below to the engine control module. The engine code is for low voltage to the module. After the battery low voltage...
P0606 this the code a mechanic gave me to repair my car can you explain it to me layman's term and the cost 2015 Ford Focus
Hello, and thank you for writing in. The check engine light and diagnostic code that sets the warning light off pertain to the ECM. This is a computer in the vehicle that processes inputs from a variety of sensor to...

More related articles

P2094 OBD-II Trouble Code: A Fault with the B Camshaft Position Actuator Control Circuit Low Bank 2
What What the P2094 code means? The P2094 code means that the camshaft position actuator control circuit has found low system voltage present. The Engine Control Unit (ECU) detects this low voltage fault for the camshaft position actuator bank 2...
P2647 OBD-II Trouble Code: System Too Rich (Bank 1)
P2647 P2647 code definition A Rocker Arm Actuator System Stuck on Bank 1 What the P2647 code means This trouble code indicates that the powertrain control module has detected a malfunction in the intake camshaft rocker arm actuator system (A)....
P2635 OBD-II Trouble Code: Fuel Pump ‘A’ Low Flow / Performance
P2635 P2635 Code Definition A P2635 code is a generic powertrain code related to computer output circuit issues. It means that the fuel pump 'A’ is registering a low flow, or one not within the preset parameters. Codes related to...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com