Mercedes-benz: U11a600

Q: Is U11A600 the same as P0106? Not exactly. P0106 is the generic OBD2 code for manifold pressure plausibility. U11A600 is Mercedes-specific and often provides more detail (e.g., which sensor B28/7 is at fault).

Q: Will disconnecting the battery reset U11A600? Temporarily, yes. But the code will return once the ECU runs its monitoring cycle (usually a few drive cycles). Disconnecting the battery is not a fix.

Q: How much does a dealer charge to fix U11A600? Diagnosis alone: $180–$250. Replacement of one sensor: $350–$550 total. If a boost leak is found, $800–$1,500. For ECU software: $200–$400. mercedes-benz u11a600

Q: Can a bad MAP sensor cause U11A600 on an AMG? Absolutely. On the M177 (C63/E63), U11A600 is often linked to the bank 1 manifold pressure sensor. AMG engines have two sensors (one per bank). You must identify which bank logged the fault.

Q: I replaced the sensor and the code came back after 50 miles. Why? Three possibilities: 1) You have an intermittent boost leak that only appears under heat expansion. 2) The wiring harness has high resistance (pin fitment issue). 3) You need the dealer software update. Q: Is U11A600 the same as P0106

Physically, the U11A600 is deceptively simple. Housed in a high-temperature, chemical-resistant thermoplastic, it measures no more than a few inches in length. One end features a two-pin electrical connector sealed with a Viton gasket; the other end is a precision-machined hydraulic spool or a plunger. Inside, a copper-wound coil surrounds a ferromagnetic core.

When the engine control unit detects a rough road surface or a hard cornering maneuver, it sends a pulse-width modulated signal to the U11A600. The coil energizes, creating a magnetic field that moves the plunger a fraction of a millimeter. This movement opens or closes a tiny hydraulic bleed orifice, which in turn adjusts the oil pressure in the shock absorber’s bypass circuit—or, in a transmission application, changes the clamping force of a clutch pack. The result is seamless: a suspension that instantly softens over a pothole or a gear change that occurs with imperceptible smoothness. The U11A600’s job is to be felt only by its absence; when it fails, the vehicle’s character degrades abruptly, producing harsh shifts or a bouncy, uncontrolled ride. If you drive one of these vehicles and

While this code can appear across the lineup, it is statistically most common in:

If you drive one of these vehicles and have intermittent warning lights, U11A600 should be high on your suspect list.

If U11A600 corresponds to an internal circuit board of an instrument cluster or control module, the following failure modes are probable:

OEM Part Number: Typically A000 905 29 03, A000 905 31 03, or A001 153 93 28 (confirm for your specific engine).