← View Generic P0402 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2014 Nissan SENTRA
P0402: Exhaust Gas Recirculation Flow Excessive Detected
on 2014 Nissan SENTRA
Fix Cost
$50 - $350
Parts & Labor
Difficulty
3/5
1-3 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2014 Nissan
SENTRA
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Important for 2014 Nissan SENTRA Owners
Before starting repairs, verify which engine your 2014 Nissan SENTRA has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does P0402 Mean on 2014 Nissan SENTRA?
The EGR system is flowing too much exhaust gas back into the intake, causing performance issues.
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Symptoms
- • Rough idle
- • stalling
- • poor acceleration
- • black smoke from exhaust
- • knocking
- • check engine light.
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Common Causes
- • EGR valve stuck open
- • faulty EGR valve position sensor
- • vacuum leaks causing excessive EGR flow
- • carbon buildup preventing valve closure.
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How to Fix P0402 on 2014 Nissan SENTRA
Replace EGR valve, clean EGR valve and passages, repair vacuum system, replace EGR position sensor.
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Need Maintenance Info for Your SENTRA?
Get oil capacity, filter specs, and torque settings for your specific 2014 Nissan SENTRA.
View 2014 Nissan SENTRA SpecsParts for 2014 Nissan SENTRA
Essential Tool
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Related Diagnostic Codes
Other codes that may appear with P0402
P0400
Sequential Code
P0400: Emissions Control System Malfunction
Medium
P0401
Sequential Code
Exhaust Gas Recirculation Flow Insufficient Detected
Medium
P0403
Sequential Code
P0403: Emissions Control System Not Operating Within Normal Parameters
Medium
P0404
Sequential Code
Exhaust Gas Recirculation Circuit Range/Performance
Medium
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system