Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks the air going into the engine is too hot because the sensor is sending a high signal.
The charge air temperature sensor measures the temperature of the air entering the engine. A high circuit signal indicates the sensor is reporting a higher temperature than expected.
The P1245 code is set when the Engine Control Module (ECM) detects a signal from the Charge Air Temperature (CAT) sensor that is higher than the calibrated threshold. This could be due to a faulty sensor, wiring issues, or a problem with the ECM itself.
• Check Engine Light illuminated
• Poor engine performance
• Decreased fuel efficiency
• Faulty charge air temperature sensor
• Wiring issues such as short to voltage
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the charge air temperature sensor and its wiring for damage.
• Test the sensor with a multimeter to check for correct resistance values.
• Replace the charge air temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect sensors and wiring.
• Keep the engine bay clean to prevent overheating.
• Follow scheduled maintenance.
Sensor Issue
• Do not ignore the Check Engine Light.
• Seek professional diagnosis if unsure.
• Regular maintenance can prevent such issues.
Check with your vehicle manufacturer for specific warranty coverage on sensors.
This code has been more prevalent in vehicles with turbocharged engines where charge air temperature is critical.
Moderate – While the vehicle may still be drivable, performance and fuel efficiency could be affected.
Driving with a faulty sensor can lead to engine damage over time. Always address Check Engine Light issues promptly.
• Engine at operating temperature
• Ambient temperature within normal range
The charge air temperature sensor is typically located in the intake manifold or air ducting near the throttle body.
Q: Can I drive with a P1245 code?
A: It's possible, but not recommended as it can affect engine performance and fuel efficiency.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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