P0665 OBD-II Trouble Code: Intake Manifold Tuning Valve Control Circuit High Bank 2

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0665 code

P0665 is a diagnostic trouble code (DTC) for "Intake Manifold Tuning Valve Control Circuit High Bank 2". 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 P0665 DIAGNOSTIC Get a fair and transparent estimate upfront

P0665 code definition

The P0665 trouble code notes an electrical malfunction with the intake manifold tuning valve control circuit in engine bank 2

What the P0665 code means

The P0665 code is a standard OBD-II trouble code that detects an error with the intake manifold tuning valve control circuit in engine bank 2. Bank 2 is the engine bank that opposes the number 1 cylinder. The intake manifold tuning valve control circuit is constantly monitored by the powertrain control module (PCM), the fuel injection control module, the transmission control module, and numerous other control modules. If any of these modules detects an abnormal reading from the intake manifold tuning valve control circuit, or is unable to receive a reading from the circuit, then the P0665 trouble code will be stored.

What causes the P0665 code?

Potential causes of the P0665 trouble code are:

  • Defective PCM driver
  • Loose control module ground strap
  • Broken control module ground wire
  • Faulty fuel injector control module
  • In rare cases, a malfunctioning PCM or CAN bus
  • Damaged electrical components in the PCM or the controller area network (CAN) bus

What are the symptoms of the P0665 code?

The P0665 code is generally accompanied by the Check Engine Light, which will illuminate on the dashboard. It is likely that engine and transmission performance problems will be present, namely rough idling, hesitant or slow acceleration, and constant stalling at idle. It is common for the vehicle to also experience reduced fuel efficiency.

How does a mechanic diagnose the P0665 code?

The P0665 code will be diagnosed with an OBD-II trouble code scanner. A trustworthy mechanic will assess the code by viewing the freeze frame data from the scanner. The mechanic will also use the scanner to check for the presence of other trouble codes. If multiple trouble codes are presented, then they will need to be inspected and repaired in the order in which they are displayed. The mechanic will then reset the trouble codes and restart the vehicle, to see if the P0664 code remains detected. If it does not, then an incorrect trigger or an intermittent issue are likely to blame.

If the code does return following the reset, then the technician will visually inspect all of the electrical components in the PCM and CAN bus systems, and replace any wires, fuses, and connectors that are short, blown, open, or damaged. The ground strap and ground wire will then require inspection. If the problem is unsolved, then a specialized CAN scanner can be used to gain insight into the control modules, which will help the mechanic identify the issue.

Any time the mechanic replaces a component, then the trouble codes will need to again be reset, the vehicle again restarted, and the code once more checked for. This helps the technician know when the P0665 code has been resolved.

Common mistakes when diagnosing the P0665 code

The most frequently made mistake when diagnosing this code comes from a failure to follow the OBD-II diagnosis protocol. Mechanics should abide by the protocol step by step, to guarantee a diagnosis and repair that is efficient and accurate.

It is common for the P0665 code to be joined by numerous other trouble codes, many or all of which may be the result of a communication error left by the P0665 code. These codes are sometimes erroneously diagnosed and repaired before the P0665 code is, despite showing up later on the scanner.

How serious is the P0665 code?

The P0665 trouble code will not keep a car from being drivable, though there will likely be noticeable drivability issues, and possibly frequent stalling. Because of this, the vehicle should be inspected and repaired as quickly as possible.

What repairs can fix the P0665 code?

Potential repairs for the P0665 trouble code are:

  • Updating the PCM drivers
  • Reprogramming the PCM
  • Replacement of ground straps and ground wires
  • Replacement of wires, fuses, and connectors
  • Replacement of the fuel injector control module
  • In very rare cases, replacement of the PCM or CAN bus

Additional comments for consideration regarding the P0665 code

The P0665 trouble code will very rarely be caused by a faulty PCM or CAN bus. All other potential options should be thoroughly exhausted before the mechanic assumes a defective PCM or CAN bus. If they do require replacement, then they will also need to be reprogrammed.

Need help with a P0665 code?

YourMechanic offers certified mobile 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
P0665

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0665 code.

SCHEDULE P0665 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7294)

Rating Summary
6779
246
57
39
173
6779
246
57
39
173
 at YourMechanic

Simon

30 years of experience
8 reviews
Simon
30 years of experience
Honda Element L4-2.4L - Check Engine Light is on Inspection - Albuquerque, New Mexico
Simon was Professional, knowledgeable and patient throughout the entire process. Would highly recommend!
 at YourMechanic

Luke

17 years of experience
134 reviews
Luke
17 years of experience
Chevrolet Equinox L4-2.4L - Check Engine Light is on - Austin, Texas
Luke was friendly and professional. He did a nice job of explaining the issue with my car so that I could understand it.
 at YourMechanic

Chuy

14 years of experience
386 reviews
Chuy
14 years of experience
Toyota Camry L4-2.5L - Check Engine Light is on - Chicago, Illinois
His explained everything very clearly on what I should do next with my car and what the cheapest solutions were.
 at YourMechanic

Jose

12 years of experience
31 reviews
Jose
12 years of experience
Chrysler Pacifica V6-3.8L - Check Engine Light is on - Redlands, California
Very friendly and punctual. Knows what he is talking about. Appreciate Jose working on my car. I would recommend him to customers.


More related articles

P0714 OBD-II Trouble Code: Transmission Fluid Temperature Sensor Circuit Intermittent
P0714 code means there is an abnormal transmission temperature often due too low transmission fluid and faulty parts.
P0452 OBD-II Trouble Code: Evaporative Emission Control System Pressure Sensor Low Input
P0452 means there is a issue with the fuel tank pressure sensor or the evaporative pressure sensor. Some causes are a loose fuel gap or a vacuum leak.
P008A OBD-II Trouble Code: Pressure Fuel System Pressure - Too Low
P008A means that fuel has entered into the system and sent a false signal due to a faulty fuel pressure sensor or problems with the fuel pump.

Related questions

Truck running rough over 55 MPH.

I would have a technician come scan the codes (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) on the computer and perform a tune up as well. Your spark plugs (https://www.yourmechanic.com/services/spark-plugs-replacement) are recommended to be replaced at 30,000 miles. I would also replace your fuel filter (https://www.yourmechanic.com/services/fuel-filter-replacement)...

Don't understand CEL Codes.

The codes P0300 through P0306 are for misfires of random cylinders or different cylinders. The second code P1456 is for the evaporative fuel tank system having a leak somewhere in the system (https://www.yourmechanic.com/article/how-to-diagnose-a-fluid-leak-by-mark-vallet). Since you are getting random misfires, then...

Display isn't working, says a/c isn't connected, engine just lost power- but a/c, radiator, oil, gas, intake are all connected.

That sounds frustrating. You will need to get your car scanned using a scan tool that communicates well with a Prius. This will identify the diagnostic trouble codes (DTCs) that you can use to begin your diagnosis. You can start...

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