P1104 BMW Code - Differential Pressure Sensor Intake Manifold Plausibility

P1104 indicates an issue with the Differential Pressure Sensor in the intake manifold, suggesting a plausibility problem where sensor readings are inconsistent or outside expected ranges.

Symptoms may include reduced engine performance, rough idling, increased fuel consumption, and the Check Engine Light being illuminated.

Common causes include a faulty differential pressure sensor, intake manifold leaks, clogged or dirty sensors, or damaged wiring and connectors.

While the car may still be drivable, ignoring this code can lead to increased engine wear, reduced fuel efficiency, and potential damage to other components over time.

Use an OBDII scanner to confirm the code, inspect the differential pressure sensor for damage, check the intake manifold for leaks, and examine wiring and connectors for corrosion or wear.

You may need an OBDII scanner, a multimeter, basic hand tools, and potentially replacement parts like a new differential pressure sensor or connectors.

Repairs typically involve replacing the faulty differential pressure sensor, fixing intake manifold leaks, cleaning clogged sensors, or repairing damaged wiring.

Costs can vary, but replacing a differential pressure sensor may range from $100 to $300, plus labor if performed by a mechanic.

While unlikely, a severely clogged air filter could contribute to abnormal pressure readings in the intake manifold, exacerbating sensor plausibility issues.

Resetting the light may clear the code temporarily, but the problem will likely return unless the underlying issue is properly addressed.