What Does P2145 Mean?
The PCM has detected abnormally high voltage in the EGR vent control circuit. This suggests a short to power or an open ground circuit preventing proper solenoid control.
Common Causes
35%
Control circuit shorted to battery voltage or other power source
25%
Open or high resistance in ground circuit for vent solenoid
20%
Failed EGR vent solenoid with internal open or high resistance
15%
Corroded or loose ground connection at engine block or chassis
5%
PCM driver circuit malfunction providing incorrect voltage
Diagnostic Steps
1
Step 1: Inspect EGR vent solenoid ground connection for corrosion, looseness, or damage
2
Step 2: Disconnect solenoid and measure voltage at control circuit; should be near 0V with key on, engine off
3
Step 3: Check for short to power by measuring resistance from control circuit to battery positive
4
Step 4: Verify ground circuit has less than 0.5 ohms resistance to known good ground
5
Step 5: Monitor solenoid command vs actual voltage with scan tool to identify PCM output issues
Estimated Repair Cost
$110 - $550
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage in the EGR vent control circuit. This suggests a short to power or an open ground circuit preventing proper solenoid control.
The most common cause of P2145 (Exhaust Gas Recirculation Vent Control Circuit High) is: Control circuit shorted to battery voltage or other power source
Typical repair costs for P2145 range from $110 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short distances but may cause excessive NOx emissions and potential catalyst damage if ignored long-term.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2145 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control (EGR System)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
