Report Sas (Air Pump) Delete....write-Up With Pics in Performance Modifications Posted February 18, 2015 I soldered the diode inside the ECU, unplugged the air pump, and cleared the CEL. Now I am getting a CEL, but when I plug in my scanner, there are no codes registered. Cleared several times, but when I shut off and turn on the car. Any help here....am I missing something? If the car have automatic transmission it could be a code for transmission.You can't read those codes with standard scanner.At least you would need vol-fcr. Some auto transmission codes are presented via check engine light. The other possibility is that you have a specific volvo code which can't be read via standard obd II reader.