What Does P1472 Mean?
The Diagnostic Module Tank Leakage (DM-TL) switching solenoid has an electrical circuit fault. This solenoid controls airflow paths during EVAP system leak testing on vehicles with this type of leak detection system.
Common Causes
40%
Failed DM-TL switching solenoid valve
30%
Damaged wiring harness to switching solenoid
18%
Corroded or damaged electrical connector at solenoid
10%
Short to ground or power in solenoid control circuit
2%
Failed ECM output driver for solenoid control
Diagnostic Steps
1
Step 1: Locate DM-TL module (typically near fuel tank) and inspect switching solenoid connector
2
Step 2: Measure solenoid coil resistance (typically 20-50 ohms depending on manufacturer)
3
Step 3: Check for battery voltage at solenoid connector with key on
4
Step 4: Test ground circuit continuity from ECM to solenoid
5
Step 5: Activate solenoid using scan tool active test and listen/feel for clicking operation
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The Diagnostic Module Tank Leakage (DM-TL) switching solenoid has an electrical circuit fault. This solenoid controls airflow paths during EVAP system leak testing on vehicles with this type of leak detection system.
The most common cause of P1472 (Diagnostic Module Tank leakage (DM-TL) Switching Solenoid Control Circuit Electrical) is: Failed DM-TL switching solenoid valve
Typical repair costs for P1472 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive. EVAP leak detection will not function properly, resulting in emissions test failure but no drivability issues.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1472 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Manufacturer
Recommended Tools
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