Receiving the P1135 trouble code on a Toyota Tacoma generally signifies an issue with an oxygen sensor. Specifically it suggests a non-working Air FuELRatio (A/F) Sensor, or AFR-Sensor. An older Tacoma will have a lot of d***y and clogged up parts. Even if You are very careful with routine maintenance, dirt and carbon builds up on any car that has been driven for years. This specific gauge is more like the front oxygen sensor and can be easily cleaned with a penetrating catalyst or brake cleaner. If the component appears to be beyond recovery, then replacement is also a possibility. Either way, this is the likely culprit for the P1135 code and it's relatively simple to replace and fix.
Robert J.
April 10, 2020
Obd-ii code p1135 is a general failure in the air / fuel sensor circuit for bank 1, sensor 1. To produce reliable voltage signals, the air / fuel ratio sensor must exceed a certain operating temperature, a minimum of 1200 degrees fahrenheit.
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