P2677 code meaning
Air Cleaner Inlet Control Circuit High
What P2677 means
The counterpart to P2676: the controller sees the drive line of the air cleaner inlet flap at too high a voltage, so it cannot pull the actuator in when asked. A short from the control wire to battery voltage, a failed output stage, or an open coil that leaves the line at supply level produce this pattern. In Ford's 2014 gasoline code list P2677 appears next to P2676, again as a continuous check without the MIL mark, meaning a stored code need not light the warning lamp. Beyond that list no manufacturer documents P2677 publicly. CARB's rules for monitored outputs explain why the driver stage is watched at all. The flap typically remains in its unpowered default position, and the car drives normally.
P2677 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2677
- Code stored, often without warning lamp
- Inlet flap remains in its default position
Common causes of P2677
- Most likelyControl wire shorted to battery voltage
- PossibleOpen coil in the flap actuator
- Less likelyFailed output stage in the control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Air cleaner inlet valveSolenoidWiring harness
What each part of P2677 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 77 | The exact fault in that area. |
What to do next
- Note P2677 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2677
What does P2677 mean?
P2677 means "Air Cleaner Inlet Control Circuit High". The counterpart to P2676: the controller sees the drive line of the air cleaner inlet flap at too high a voltage, so it cannot pull the actuator in when asked. It is a generic code, so it means the same on every make.
Is it safe to drive with P2677?
P2677 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2677 fail an emissions test?
P2677 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2677 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2677 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.