Possible causes

– Leaking injector, regulator or excessive fuel pressure
– Engine vacuum leak or open EGR valve at idle
– Engine mechanical condition
– Faulty HO2S or Mass Air Flow (MAF) sensor

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1132 MAZDA Description

A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

MAZDA Technical Service Bulletins for P1132 code