P0400 Error on Audi

Q: P0400 Error on Audi

If the Check Engine light of your Audi is on and the scanner shows the P0400 code, it means the ECU has detected the following problem: Crankshaft Position Sensor B Circuit Intermittent

What it means and how to fix it

🚨 Fault Description (P0400)

If the Check Engine light of your Audi is on and the scanner shows the P0400 code, it means the ECU has detected the following problem:

"Crankshaft Position Sensor B Circuit Intermittent"

Despite being a generic fault, how it affects performance and where the physical problem is located changes a lot depending on the specific Audi model you drive.

Other frequent faults detected in Audi:

P0420 P0300 P0171 P0401 P0141 P0430 P0113 P0455 P0301 P0302 P0303 P0304 P0135 P0442 P0172

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Recommended OBD2 Scanner for Audi

To clear the engine light and read the P0400 code from your phone, you need an OBD2 adapter compatible with the Audi ECU.

🛒 View Compatible Scanner on Amazon