P0127: Intake air temperature too high
Drive carefully. Get it checked within a week or two.
Can I drive with P0127?
Yes, but drive carefully and get it checked soon. Superheated intake air reduces engine knock resistance and prompts power retarding.
What does P0127 mean?
P0127 stands for Intake Air Temperature Too High.
Symptoms you may notice
- Check engine light illuminated
- Mild hesitation during cold engine startup
- Slight drop in highway fuel economy in extreme cold or heat
How much does it cost to fix?
Repair costs for code P0127 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Intercooler pump or fan failure on turbocharged vehicles
- Missing or damaged air intake heat shield
- Faulty IAT sensor reading artificially high
- Blocked intercooler radiator airflow
What to do next
- Check auxiliary intercooler coolant level and pump operation if turbocharged.
- Inspect the cold air intake tube to verify it is drawing air from outside the engine bay.
- Test IAT sensor accuracy with the engine cold.
Last updated: October 2026
Related codes
General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P0127 is typically encountered on forced-induction (turbocharged or supercharged) engines where charge air temperature exceeds safe limits (often over 140°F/60°C). The computer pulls ignition timing to protect the engine from pre-ignition knock. Avoid aggressive acceleration until the charge cooling system is inspected.