P1656 — Intake CMP Actuator Solenoid Control Circuit

What Does P1656 Mean?

P1656 is a manufacturer-specific diagnostic trouble code: Intake CMP Actuator Solenoid Control Circuit. This code applies to GEO, ACURA, HONDA, INFINITI, VOLKSWAGEN vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1656

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Intake CMP Actuator Solenoid readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Intake CMP Actuator Solenoid circuit (damaged, chafed, or corroded)
🔍 Faulty Intake CMP Actuator Solenoid connector or terminal
🔍 Failed Intake CMP Actuator Solenoid
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P1656 mean?

P1656 indicates: Intake CMP Actuator Solenoid Control Circuit. The vehicle's computer has detected that the Intake CMP Actuator Solenoid is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1656?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1656 for extended periods may cause additional problems.

How much does it cost to fix P1656?

Repair costs for P1656 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Intake CMP Actuator Solenoid wiring and connectors
🔧 Replace faulty Intake CMP Actuator Solenoid

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1656: Intake CMP Actuator Solenoid Control Circuit