Upstream O2 sensor ageing
- Symptoms
- Poor fuel average, CEL
- Likely cause
- O2 sensor wears (~100k miles)
- Fix
- Test or replace the sensor
- Applies to
- All E120
- Related fault codes
- P0130, P0133, P0135
- Confidence
- medium
Sources
- toyotanation.com/threads/2003-2008-corolla-matrix-pontiac-vibe-common-
- toyotamanuals.gitlab.io/RM01J1E/htmlweb/rm01j1e/rm/rm821e/m_05_0048.pd
Related problems on this car
- Ignition coil-on-plug failure / misfire
- Dirty MAF sensor
- Poor fuel average after a bad tune-up
- US ECM reprogramming / harsh shift (2005-2008 1ZZ automatic)
Similar problems on other cars
- High fuel consumption · Toyota Passo (1st gen)
- Low fuel average in the city · Suzuki Wagon R (Pakistan, K10B)
Where the parts are · Warning lights · Fault codes · Maintenance
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Guidance only – confirm with a mechanic before repairs. All common problems