Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a sensor in your car is detecting that a part called the EGR cooler bypass is not working correctly. It's like a switch that helps control how hot gases move in your engine, and right now, it's not in the right position.
The EGR (Exhaust Gas Recirculation) cooler bypass position sensor is detecting a voltage level that is higher than expected, indicating a potential issue with the sensor or the circuit.
The P249A code is triggered when the Powertrain Control Module (PCM) detects a high voltage signal from the EGR cooler bypass position sensor on Bank 2. This sensor monitors the position of the EGR cooler bypass valve, which controls the flow of exhaust gases through the EGR cooler. A high circuit reading suggests a malfunction in the sensor or wiring.
• Check Engine Light illuminated
• Poor engine performance
• Increased emissions
• Faulty EGR cooler bypass position sensor
• Wiring issues such as short circuits or open circuits
• Faulty PCM
EGR: Exhaust Gas Recirculation
PCM: Powertrain Control Module
• Scan the vehicle for additional trouble codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the EGR cooler bypass position sensor for proper operation.
• Replace the EGR cooler bypass position sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram 2500
• Regularly inspect and maintain the EGR system.
• Ensure all sensors and wiring are in good condition.
• Use high-quality fuel to prevent carbon buildup.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
The P249A code has been associated with issues in diesel engines where EGR systems are more prevalent.
Moderate – While the vehicle can still be driven, it may experience reduced performance and increased emissions.
Driving with a malfunctioning EGR system may violate emissions regulations and contribute to air pollution.
• Engine running at normal operating temperature
• EGR system active
The EGR cooler bypass position sensor is typically located near the EGR cooler on the engine, on the side corresponding to Bank 2.
Q: Can I drive my car with a P249A code?
A: While the car may still be drivable, it's best to have it checked as soon as possible to avoid potential engine damage.
Q: What happens if I ignore the P249A code?
A: Ignoring the code can lead to increased emissions, poor engine performance, and potential damage to the EGR system.
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