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 has detected that the pressure in the exhaust system on one side of the engine is too high. It's like when you blow into a straw, and something is blocking the end, making it hard to blow air through.
This code indicates that the exhaust pressure sensor has detected a pressure level that is higher than the acceptable range for the exhaust system on Bank 2 of the engine.
The P28F8 code is triggered when the Powertrain Control Module (PCM) detects that the exhaust pressure in Bank 2 is exceeding the manufacturer's specified limits. This could be due to a restriction in the exhaust system, a faulty exhaust pressure sensor, or other related issues.
• Reduced engine performance
• Check Engine Light illuminated
• Poor fuel economy
• Blocked or restricted exhaust system
• Faulty exhaust pressure sensor
• Exhaust leak before the sensor
PCM: Powertrain Control Module
Bank 2: The side of the engine opposite to Bank 1, typically the side with cylinder 2.
• Use an OBD-II scanner to confirm the code.
• Inspect the exhaust system for blockages or restrictions.
• Test the exhaust pressure sensor for proper operation.
• Clear any blockages in the exhaust system.
• Replace the faulty exhaust pressure sensor.
• Repair any exhaust leaks.
• OBD-II scanner
• Multimeter
• Exhaust back pressure gauge
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regularly inspect the exhaust system for leaks or damage.
• Ensure timely maintenance of the vehicle's exhaust components.
• Avoid driving through deep water which can damage the exhaust.
Engine Performance
• Do not ignore the Check Engine Light.
• Consult a professional mechanic if unsure about repairs.
Check with your vehicle manufacturer for warranty coverage on exhaust components.
This code has been more prevalent in vehicles with high mileage or those frequently used for towing.
Moderate – Should be addressed soon to prevent further engine performance issues.
Driving with a malfunctioning exhaust system can lead to increased emissions and may fail emissions testing.
• Engine running at operating temperature
• Vehicle at idle or under load
The exhaust pressure sensor is typically located on the exhaust manifold or near the catalytic converter on Bank 2.
Q: Can I drive my car with a P28F8 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to reduced performance and increased emissions.
Q: How can I prevent exhaust pressure issues?
A: Regular maintenance and inspection of the exhaust system can help prevent pressure issues.
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