What this code means

The Throttle Position sensor and Mass Air Flow sensor readings do not agree with each other. When the throttle shows a certain opening, the MAF does not confirm the expected airflow, indicating one sensor may be faulty.

Symptoms

• Check Engine Light
• Poor acceleration
• Rough idle
• Hesitation
• Poor fuel economy

Common causes

• Dirty or faulty MAF sensor
• Faulty TP sensor
• Vacuum leak
• Restricted air filter
• Intake air leak

Diagnostic steps

1. Compare TP and MAF readings simultaneously on scan tool
2. Clean MAF sensor
3. Check for vacuum leaks
4. Test TP sensor through full range
5. Replace air filter if dirty

Repair notes

Clean MAF sensor. Check for vacuum leaks. Replace faulty sensor.

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