Faulty EVAP vent solenoid (internal open or short coil); Damaged, corroded or loose wiring or connector at the vent solenoid, often exposed near the fuel tank; Open or short in the control wire to the engine control module, or in the power supply to the solenoid; Water, dirt or corrosion contaminating the solenoid connector or vent assembly; Blown fuse or fault in the relevant power feed circuit (depends on model and year); Faulty engine control module output driver.

P1675

EVAP Vent Solenoid Control Circuit.

Cadillac
Powertrain
Manufacturer code
Low severity

How this code is built

P: SystemPowertrain
1: Defined byThe manufacturer
6: AreaComputer and output circuits
75: FaultThe specific fault in that area

What it means

P1675 on a Cadillac is a manufacturer-specific code for a fault in the EVAP vent solenoid control circuit. The engine control module drives the vent solenoid to open or close the fresh air path into the evaporative system, and it has detected an electrical problem such as an open circuit, short or a driver fault when commanding it. This stops the module running proper leak tests on the fuel vapour system.

Symptoms

Check engine light on
Fuel filler difficult to fill, with the pump clicking off repeatedly
Fuel smell around the car or near the rear
Other EVAP codes stored alongside, such as leak or purge faults
Failed emissions test due to EVAP monitor not completing
Often no change in driveability

Possible causes

Faulty EVAP vent solenoid (internal open or short coil)likely
Damaged, corroded or loose wiring or connector at the vent solenoid, often exposed near the fuel tanklikely
Open or short in the control wire to the engine control module, or in the power supply to the solenoidpossible
Water, dirt or corrosion contaminating the solenoid connector or vent assemblypossible
Blown fuse or fault in the relevant power feed circuit (depends on model and year)possible
Faulty engine control module output driverrare

How to diagnose

Read all stored and pending codes and note freeze frame data, then check for other EVAP codes that may point to the same fault
Check the relevant fuse and look up the wiring diagram for the model and engine, as vent solenoid location and circuit layout vary
Inspect the vent solenoid, its connector and the wiring back along the harness for damage, chafing, corrosion, water or rodent damage
Measure the solenoid coil resistance and compare it with the manufacturer specification
With the connector unplugged, check for supply voltage and a good earth or control signal as the wiring diagram specifies
Use a scan tool bi-directional test to command the vent solenoid on and off, and listen or feel for it clicking
Check the control wire for continuity and for shorts to earth or voltage, and inspect the vent path for blockage
Only if wiring and solenoid test good, test the module output and consider module fault

How to fix

Replace the EVAP vent solenoid if the coil or operation is faulty
Repair or replace damaged wiring and clean or renew corroded connectors
Replace the blown fuse after finding the cause of the overload
Clear any blockage or contamination in the vent assembly and fit any protective cover that is missing
Repair or replace the engine control module only after all other causes are ruled out, following the manufacturer procedure

Can I keep driving?

Low severity

The car is normally fine to drive as this is an emissions fault and does not usually affect running. Book it in soon, as it will leave the EVAP system untested and may cause fuel vapour smells or a failed emissions test.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.