CARWATCH
P0400 Error on Jeep
What it means and how to fix it
🚨 Fault Description (P0400)
The DTC code P0400 in a Jeep vehicle is a sign that the onboard computer has registered the following anomaly:
"Crankshaft Position Sensor B Circuit Intermittent"
Although this is a standardized OBD2 code, the symptoms and the location of the faulty sensor can vary depending on the exact model of your Jeep (year, engine type, etc).
Other frequent faults detected in Jeep:
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To clear the engine light and read the P0400 code from your phone, you need an OBD2 adapter compatible with the Jeep ECU.
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