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P2AA5: EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1

Severity
Medium
System
Vehicle Systems
Last reviewed: Last updated:

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 P2AA5 Mean?

P2AA5 is a diagnostic trouble code indicating: EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2AA5

Common Causes

Frequently Asked Questions

What does P2AA5 mean?
P2AA5 indicates: EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1. The vehicle's computer has detected that the EGR Cooler Bypass is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P2AA5?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2AA5 for extended periods may cause additional problems.
How much does it cost to fix P2AA5?
Repair costs for P2AA5 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect and repair EGR Cooler Bypass wiring and connectors
  • 🔧 Replace faulty EGR Cooler Bypass
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

P2A00 O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 P2A01 O2 Sensor Circuit Range/Performance Bank 1 Sensor 2 P2A02 O2 Sensor Circuit Range/Performance Bank 1 Sensor 3 P2A03 O2 Sensor Circuit Range/Performance Bank 2 Sensor 1 P2A04 O2 Sensor Circuit Range/Performance Bank 2 Sensor 2 P2A05 O2 Sensor Circuit Range/Performance Bank 2 Sensor 3 P2A06 O2 Sensor Negative Voltage Bank 1 Sensor 1 P2A07 O2 Sensor Negative Voltage Bank 1 Sensor 2 P2A08 O2 Sensor Negative Voltage Bank 1 Sensor 3 P2A09 O2 Sensor Negative Voltage Bank 2 Sensor 1