What Does P2677 Mean?
The air cleaner inlet control circuit voltage is higher than expected. This indicates an open circuit, short to power, or failed actuator preventing ECM from controlling the inlet valve.
Common Causes
35%
Open circuit in ground wire or control wire
25%
Short to power in control circuit wiring
20%
Failed air inlet control actuator with open winding
15%
Poor ground connection at actuator or ECM
5%
Failed ECM unable to pull circuit low
Diagnostic Steps
1
Step 1: Disconnect actuator and measure resistance across terminals; compare to specifications
2
Step 2: Check for proper ground at actuator connector using multimeter
3
Step 3: Test for voltage on control wire with key on and actuator disconnected
4
Step 4: Inspect wiring for damage and test continuity from ECM to actuator on all circuits
5
Step 5: If circuits test good, replace actuator; retest and check ECM if problem persists
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The air cleaner inlet control circuit voltage is higher than expected. This indicates an open circuit, short to power, or failed actuator preventing ECM from controlling the inlet valve.
The most common cause of P2677 (Air Cleaner Inlet Control Circuit High) is: Open circuit in ground wire or control wire
Typical repair costs for P2677 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive with no immediate concerns. May experience slightly longer warm-up time in cold weather.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2677 to identify the root cause.
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Quick Info
Category
Powertrain
System
Air Intake System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
