P00A4 — Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2

What Does P00A4 Mean?

P00A4 is a diagnostic trouble code indicating: Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P00A4

⚠️ Check Engine Light (MIL) illuminated
⚠️ Charge Air Cooler Temperature Sensor signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Poor fuel economy

Common Causes

🔍 Loose or intermittent connection at Charge Air Cooler Temperature Sensor
🔍 Wire chafing causing intermittent contact
🔍 Charge Air Cooler Temperature Sensor failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P00A4 mean?

P00A4 indicates: Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2. The vehicle's computer has detected that the Charge Air Cooler Temperature Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P00A4?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P00A4 for extended periods may cause additional problems.

How much does it cost to fix P00A4?

Repair costs for P00A4 typically range from $30 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 reseat all Charge Air Cooler Temperature Sensor connectors
🔧 Repair chafed or damaged wiring in Charge Air Cooler Temperature Sensor circuit
🔧 Replace Charge Air Cooler Temperature Sensor if failing intermittently

1
Find your vehicle above
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2
Check for recalls
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P00A4: Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2