Engine Controls - AFR Sensor Codes

SOURCE: Subaru Tech Tips

TITLE: AFR Sensor Heater Codes

APPLIES TO: 04 Legacy PZEV

SERVICE TIP:

If you get a 2004MY Legacy PZEV vehicle with a list of AFR Sensor heater codes (P0030, P0031, P0032, P0037, etc), try replacing the AFR Sensor Heater Relay. The relay P/N is 25229AA100.

Note: As with any part numbers listed, we always recommend you double check the number(s) with your parts department to make certain the number is current and correct.