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Q: getting a p170 code reading.what is problem & how much should the repair cost be on 2001 Cadillac Seville SLS

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is this a air vacumn leak? or fuel trim system lean & waht is required to fix
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lean bank one could be vac leak or inj issue or fuel pressure issue. can you read data stream with the scanner u have
P0170 means there was a malfunction in the computer's control of the air:fuel ratio. It also indicates that the fuel trims reached their limit of adding fuel while trying to compensate for a actual or perceived rich condition.

When the fuel trims reach their rich correction limit, the PCM (Powertrain Control Module) sets a P0170, indicating a problem or malfunction in the fuel trims. It may also have a P0173 referring to the same malfunction but on bank two.
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