P0660 Technical Description
Intake Manifold Tuning Valve Control Circuit/Open.
If you’re reading this, you’re likely dealing with a P0660 trouble code and need to know what it means and how to fix it.
I’ve seen this issue more times than I can count. In this guide, we’ll cover what P0660 means, its symptoms, common causes, and how you can fix it.
Let’s get started without further ado.
Key Takeaways
- P0660 trouble code indicates an issue with the intake manifold tuning valve control circuit.
- Symptoms include poor engine performance, increased fuel consumption, and engine misfires.
- Common causes are faulty valves, damaged wiring, or a malfunctioning PCM.
- Diagnose by checking wiring, connectors, and testing the intake manifold tuning valve.
- Repair involves fixing any wiring issues, replacing faulty components, or potentially the PCM.
- Clear the code with an OBD-II scanner and monitor for recurrence.
Table of ContentsShow
What Does P0660 Trouble Code Mean?
The P0660 trouble code means that your car’s powertrain control module (PCM) has detected a problem with the intake manifold tuning valve control circuit.
This valve adjusts the length of the intake manifold runners to optimize air flow based on engine speed and load. When the PCM detects an issue, it triggers the P0660 code.
In simple terms, this code is telling you that there’s a disruption or break in the circuit that controls this valve.
The intake manifold tuning valve is essential for regulating the air-fuel mixture entering the engine. Proper operation of this valve ensures optimal engine performance and efficiency.
When the intake manifold tuning valve control circuit malfunctions, your engine might not be able to adjust air flow effectively.
This can lead to poor performance, increased fuel consumption, and even engine stalling. The PCM monitors the voltage and resistance in the intake manifold tuning valve control circuit.
If it detects values outside the specified range, it sets the P0660 code. This can be due to wiring issues, a faulty valve, or problems with the PCM itself.
To diagnose and fix this code, a mechanic will typically start by inspecting the wiring and connectors in the circuit.
They might also test the valve and the PCM to identify the root cause. Addressing the P0660 code promptly is crucial to maintain your vehicle’s performance and avoid further engine problems.
P0660 Trouble Code Symptoms
Here are the common symptoms associated with the P0660 trouble code:
- Check Engine Light is on
- Poor engine performance
- Increased fuel consumption
- Engine misfires
- Rough idling
- Difficulty starting the engine
- Reduced power during acceleration
P0660 Trouble Code Causes
Here are the common causes for the P0660 trouble code:
- Faulty intake manifold tuning valve
- Damaged or corroded wiring in the control circuit
- Loose or disconnected connectors
- Malfunctioning powertrain control module (PCM)
- Short or open circuit in the intake manifold tuning valve control circuit
How To Fix A P0660 Trouble Code
To fix a P0660 trouble code, follow these steps to diagnose and repair the issue:
1. Check for Other Codes
Use an OBD-II scanner to check for other trouble codes. Address any related codes first, as they might be causing the P0660 code.
2. Inspect the Wiring and Connectors
Examine the wiring and connectors in the intake manifold tuning valve control circuit for any signs of damage, corrosion, or disconnection. Repair or replace any damaged wiring and ensure all connectors are secure.
3. Test the Intake Manifold Tuning Valve
Use a multimeter to test the intake manifold tuning valve for proper resistance. Compare the readings with the manufacturer’s specifications. If the valve is out of range, replace it.
4. Check the Control Circuit
Inspect the control circuit for any shorts or open circuits. Use a wiring diagram to trace the circuit and ensure continuity. Repair any shorts or open circuits found.
5. Test the PCM
If the wiring, connectors, and valve are all in good condition, the problem might lie with the PCM. Consult a professional mechanic to test the PCM and replace it if necessary.
6. Clear the Codes
After making the necessary repairs, clear the trouble codes using the OBD-II scanner. Drive the vehicle and monitor for any recurrence of the P0660 code.
By following these steps, you can diagnose and repair the P0660 trouble code, ensuring your vehicle runs smoothly again.
Conclusion
You now know what the P0660 trouble code means and how to fix it.
Have you encountered this issue before?
Share your experiences or questions in the comments below—let’s chat about it!
