P04D2: EGR Temperature Sensor C Circuit Intermittent/Erratic
Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What Does P04D2 Mean?
P04D2 is a diagnostic trouble code indicating: EGR Temperature Sensor C Circuit Intermittent/Erratic. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Symptoms of P04D2
- ⚠️ Check Engine Light (MIL) illuminated
- ⚠️ EGR Temperature Sensor C signal cutting in and out
- ⚠️ Related system working sometimes but not consistently
- ⚠️ Failed emissions test
Common Causes
- 🔍 Loose or intermittent connection at EGR Temperature Sensor C
- 🔍 Wire chafing causing intermittent contact
- 🔍 EGR Temperature Sensor C failing under heat or vibration
- 🔍 Corroded connector pins with partial contact
Frequently Asked Questions
What does P04D2 mean?
Can I drive with code P04D2?
How much does it cost to fix P04D2?
What To Do Next
Possible Fixes
- 🔧 Inspect and reseat all EGR Temperature Sensor C connectors
- 🔧 Repair chafed or damaged wiring in EGR Temperature Sensor C circuit
- 🔧 Replace EGR Temperature Sensor C if failing intermittently
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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.