P0171 Error on Subaru

Q: P0171 Error on Subaru

If the Check Engine light of your Subaru is on and the scanner shows the P0171 code, it means the ECU has detected the following problem: Fuel Trim Malfunction (Bank 1)

What it means and how to fix it

🚨 Fault Description (P0171)

If the Check Engine light of your Subaru is on and the scanner shows the P0171 code, it means the ECU has detected the following problem:

"Fuel Trim Malfunction (Bank 1)"

Keep in mind that the severity and repairs for this code depend entirely on the specifications of your Subaru, whether diesel, petrol, or hybrid.

Other frequent faults detected in Subaru:

P0420 P0300 P0401 P0141 P0430 P0113 P0455 P0301 P0302 P0303 P0304 P0135 P0442 P0172 P0133

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Recommended OBD2 Scanner for Subaru

To clear the engine light and read the P0171 code from your phone, you need an OBD2 adapter compatible with the Subaru ECU.

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