What Does P2024 Mean?
DTC P2024 indicates a circuit malfunction in the evaporative emissions (EVAP) fuel vapor temperature sensor. This sensor measures the temperature of fuel vapors in the EVAP system canister or purge line, helping the ECM calculate vapor density for accurate purge flow control. The ECM has detected that the sensor signal is absent, stuck, or outside the valid electrical range.
Common Causes
35%
Failed EVAP fuel vapor temperature sensor
25%
Open or shorted wiring in the vapor temperature sensor circuit
20%
Corroded or disconnected connector at the vapor temperature sensor
12%
Missing or incorrect reference voltage supply to the sensor
8%
ECM input circuit fault for the vapor temperature channel
Diagnostic Steps
1
Verify 5V reference voltage is present at the EVAP fuel vapor temperature sensor connector.
2
Check the sensor ground circuit for proper continuity back to the ECM.
3
Measure the sensor signal voltage with key on engine off; it should reflect an approximate ambient temperature reading.
4
Inspect the sensor connector for corrosion, moisture intrusion, or damage from proximity to fuel vapors.
5
Test the sensor resistance versus temperature characteristics using a multimeter and compare to manufacturer specification.
6
If wiring and sensor test good, test the ECM input pin with a simulated sensor signal.
Estimated Repair Cost
$80 - $300
Parts + labor, varies by vehicle and location
DTC P2024 indicates a circuit malfunction in the evaporative emissions (EVAP) fuel vapor temperature sensor. This sensor measures the temperature of fuel vapors in the EVAP system canister or purge line, helping the ECM calculate vapor density for accurate purge flow control. The ECM has detected th...
The most common cause of P2024 (Evaporative Emissions (EVAP) Fuel Vapor Temperature Sensor Circuit) is: Failed EVAP fuel vapor temperature sensor
Typical repair costs for P2024 range from $80 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No direct safety concern. The EVAP system may not purge optimally, potentially causing slightly increased fuel vapor emissions. No impact on drivability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2024 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions (EVAP)
Difficulty
Type
Generic (SAE)
Recommended Tools
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