P2402: EVAP System Leak Detection Pump Control Circuit High
What Does P2402 Mean?
P2402 is a diagnostic trouble code indicating: EVAP System Leak Detection Pump Control Circuit High. The ECM detected the control circuit voltage for the EVAP leak detection pump is above the expected range. This code has been reported in NHTSA complaints across 4 different vehicle models, most commonly on Toyota Corolla and Volkswagen Tiguan.
Symptoms of P2402
- ⚠️ Check Engine Light (MIL) illuminated
- ⚠️ Possible fuel or vapor smell from engine bay
- ⚠️ EVAP system related codes stored alongside (P043E, P043F, P2401, P2419)
- ⚠️ Possible failed emissions test
Common Causes
- 🔍 Short to voltage in EVAP leak detection pump wiring harness
- 🔍 Failed EVAP leak detection pump outputting excessive voltage
- 🔍 Damaged wiring or connector causing high-side short
- 🔍 Faulty relay feeding the EVAP pump circuit
- 🔍 ECM/PCM internal fault (rare)
P2402 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"STARTED CAR THIS MORNING AND THE CHECK ENGINE LIGHT CAME ON. TOOK TO PARTS STORE AND HOOKED IT UP TO THE COMPUTER AND FOUND CODES (P2401, P043E, P043F, P2402, P2419) EVERYTHING I HAVE RESEARCHED COMES BACK TO EVAP CANISTER FAILURE, AND POSSIBLE WIRING FAILURE."
— Toyota Corolla owner, 01/08/2021
"Known well issues, faulty tank getting water to canister."
— Toyota Corolla owner, 07/10/2023
"Recurring Problems with AWD Malfunction, Engine Light On. AWD System Malfunction/2WD Mode Engaged and the Engine Light came on."
— Toyota Rav4 owner, 05/31/2021
Source: NHTSA Complaints Database
Most Reported Vehicles for P2402
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | TOYOTA COROLLA | |
| 2 | VOLKSWAGEN TIGUAN | |
| 3 | TOYOTA RAV4 | |
| 4 | VOLKSWAGEN ATLAS |
P2402 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
What does P2402 mean?
Is P2402 serious?
Can I drive with P2402?
What vehicles commonly get P2402?
What To Do Next
Possible Fixes
- 🔧 Inspect EVAP leak detection pump wiring for shorts to power (B+)
- 🔧 Test EVAP pump with multimeter; compare resistance and voltage to spec
- 🔧 Replace EVAP leak detection pump if voltage output is out of spec
- 🔧 Inspect and clean pump connector; check relay powering the pump circuit
- 🔧 If all components check out, inspect ECM for fault; update firmware or replace
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.