Replace the whole if you have the money
SOURCE: Suzuki Forenza 2004, check engine light is on, and
the bank 1 sensor is the one before the cat
Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)
What does that mean?
This involves the front oxygen sensor on Bank 1. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.
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Symptoms
You will likely not notice any drivability problems, although there may be symptoms.
Causes
A code P0133 may mean that one or more of the following has happened:
The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
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