P0660 is a somewhat common OBDII code. It is generic, so it has the same meaning for the Dodge Journey as it does for any other vehicle manufactured since 1996.
This code indicates that there is a problem with the bank 1 side of the intake manifold valve trim control circuit. The most common causes of the P0660 code are a defective wiring harness to or from the intake tuning valve, a defective PCM, or a defective intake manifold tuning valve control circuit. The most common cause is wiring problems.
P0660 Definition: Intake Manifold Trim Valve Control Circuit Open (Bank 1)
Here is the meaning of the P0660 definition divided into its three distinct parts.
Intake manifold trim valve control circuit
The intake manifold tuning valve control system is responsible for redirecting air into your Journey’s intake manifold
Relieves air pressure on the opposite side of the intake manifold. Or, you can channel the air through a completely different duct for power/efficiency purposes.
An open implies that two points of an electrical circuit are externally disconnected. In this case, the two points in question are the PCM and the intake manifold trim valve control circuit.
The wiring between these two parts of your vehicle can go through the CAN bus system, which is a union of cables. Getting a schematic of your vehicle (exact model year and engine combination is essential) can make it easier to determine the cause of P0660. Before doing so, you should do a quick visual inspection to look for any obvious problems (more on this below).
Any of the modules in your vehicle can detect this problem. Some examples of different modules are body control, transmission, ABS, and traction control. If there is a problem in the PCM, the other modules may still report P0660.
Bank 1 is the part of your vehicle with the first cylinder. You don’t have to worry about this if you have an inline-four or inline-six engine.
P0660 Symptoms: Dodge Journey
There are usually symptoms associated with P0660. These are the most common:
- check engine light
- Decreased power at the upper end of the RPM range
- Reduced fuel consumption
- Rough/unknown idle
- Difficulty starting
Engine power decay is more likely to occur at the higher end of the RPM range. It can occur at any engine speed. You may only notice the check engine light
Dodge Journey P0660 Causes and Diagnosis
Here are the most common causes of P0660 and a good order for diagnosing your Dodge Journey at home.
1. Check the manufacturer’s communications
Manufacturers (including Dodge) send communications through “technical service bulletins,” commonly referred to as TSBs. Although this site does not maintain a database of them, they are easy to find online
If you click the link above, it will take you to the NHTSA website in a new window. Look here for your exact year and engine combination for the Dodge Journey. If there is a TSB related to the intake manifold adjusting valve, it gives you a good place to start your diagnosis with a known failure point.
2. Inspect the wiring harness
Check the wiring connector on the bank on one side of the intake manifold tuning valve control circuit.
Examine where it connects to the harness. Make sure there is no visible damage to it or the pins inside. If there is damage, you may need to renail it or replace it. If there is corrosion, use a good electrical contact cleaner to clean it.
Now that you have verified that the harness connector looks good, examine the wiring leading from the intake manifold control valve as far as you can. Look for damaged, frayed, or burned cables. If there is, replace the wiring in question
Check that the ground wire is solid and free of corrosion where it bolts to the body, engine, or frame. Then, pass a temporary ground to the intake manifold timing control valve. If the problem is resolved, you will need to fix your Journey’s OEM ground cable.
3. Defective CAN bus
The CAN bus is responsible for taking the information from the different sensors and sending it to the modules that need it (including the PCM)
If the wiring harness seems fine until it reaches the CAN bus system, its pins will need to be inspected, which is getting into the weeds for most shady mechanics.
A mechanic could use a specialized scanner to determine exactly where in the wiring system the open wiring harness is causing the P0660 on your Journey. They could also check the continuity of the circuits.
4. Other causes
- Bad PCM/ECM – Although the PCM is not usually the problem in most codes. If everything has been checked with the wiring, replacing or resetting the PCM may clear P0660. Have a mechanic take a look at your Journey before replacing the PCM
- Faulty Intake Manifold Adjusting Valve – P0660 indicates a wiring problem with the intake manifold adjusting valve. But, if your wiring may fail internally, it will throw the code. It’s not very high on the probability scale.
It can be difficult to locate some of the wiring problems that can cause P0660 on the Dodge Journey. But, it will often be caused by something that is easy to see under the engine bay. There’s nothing wrong with taking a look. Good luck!