Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a part that helps control how air flows into the engine. This code means there's a problem with the wires or the part itself that controls this air flow on one side of the engine.
The P0660 code indicates an issue with the electrical circuit that controls the intake manifold tuning valve on bank 1 of the engine. This valve adjusts the air flow for optimal engine performance.
The intake manifold tuning valve is responsible for adjusting the length of the intake manifold runners to optimize air flow into the engine's cylinders. The P0660 code is triggered when the Engine Control Module (ECM) detects an open circuit or a fault in the control circuit for this valve on bank 1.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Rough idle
• Faulty intake manifold tuning valve
• Open or shorted wiring in the valve circuit
• Bad electrical connection
• Faulty ECM
ECM: Engine Control Module
Intake Manifold: A part of the engine that distributes air to the cylinders
• Scan the vehicle for additional codes
• Inspect the wiring and connectors for damage
• Test the intake manifold tuning valve for proper operation
• Check the ECM for faults
• Repair or replace damaged wiring or connectors
• Replace the intake manifold tuning valve if faulty
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Honda Accord
• Toyota Camry
• Ford F-150
• Regular maintenance checks
• Ensure wiring harnesses are secure
• Avoid harsh environmental conditions that may damage wiring
Engine Performance
• Do not ignore the Check Engine Light
• Seek professional diagnosis if unsure
• Regularly maintain your vehicle
Check with the manufacturer for specific warranty coverage on emissions-related components.
This code has been associated with issues in vehicles with variable intake systems, often due to wear and tear or environmental factors affecting wiring.
Moderate – It should be addressed soon to avoid performance issues.
Driving with a malfunctioning engine component can lead to increased emissions and may not comply with local regulations.
• Engine at operating temperature
• Vehicle in park or neutral
The intake manifold tuning valve is located on the intake manifold, typically on the top or side of the engine.
Q: What does the intake manifold tuning valve do?
A: It adjusts the air flow into the engine to improve performance and efficiency.
Q: Can I drive with a P0660 code?
A: While the car may still run, it's best to fix the issue to avoid further problems.
High-End · Full-system diagnostics
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Network faults often require full-system access instead of a generic code reader alone.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.