Shortly after reaching cruising speed I get a continuous beep with the error code "Exhaust P1544". I have checked all hoses in the exhaust cooling system and all appear to be clear. I have flushed the exhaust cooling system, and I have replaced the exhaust cooling system sensor. I had my local dealer reset the computer and I still get the alarm. What am I missing? Someone mentioned the intake strainer. Could that be the problem or would flushing the system clean it out?