MattG27 Posted September 20, 2020 Share Posted September 20, 2020 My 55 reg Subaru Impreza WRX STI is throwing up fault code P0134. I’ve changed the O2 sensor but the engine light keeps coming back on. Any ideas? When I clear the code and the light goes off the car splutters and struggles but then as soon as the light comes on the car runs fine again. I’ve also changed the spark plugs and fuel pump since changing the sensor. Any advice would be massively appreciated! Quote Link to comment Share on other sites More sharing options...
ROSSCOSM Posted September 21, 2020 Share Posted September 21, 2020 What 02 sensor did you swap it with? I had a quick scan on other forums and theres a few people saying they had same problem until they put a genuine sensor in. Have you checked the exhaust manifold for any leaks? Quote Link to comment Share on other sites More sharing options...
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