U060B

Code

Generic U — Network/User

Lost Communication With Turbocharger/Supercharger Boost Sensor A

Brand: Generic

Type: U — Network/User

Views: UK: 27 EN: 129 RU: 39

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Broken or corroded connector(s) at the boost sensor
Damaged wiring (open, short to power or ground, intermittent) between sensor and controller
Failed boost pressure sensor/module
Loss of sensor supply (reference) voltage or sensor ground
CAN/LIN/serial bus wiring fault or shorted bus
Faulty ECM/PCM or gateway module (rare)

Symptoms

MIL/Check Engine lamp illuminated
Stored U060B and possibly other U-codes (communication/network codes)
No boost pressure value displayed on scan tool or frozen/invalid data
Reduced engine performance or limp-home mode if the ECM relies on sensor input for boost control
Intermittent or sporadic boost readings
Related subsystems (turbo control, wastegate actuator) may not respond correctly

What to check

Connect a scan tool and confirm U060B and any accompanying codes; note freeze frame and snapshot data
Verify sensor presence on network (if equipped) using module list or bus diagnostics
Visual inspection of the sensor connector, wiring harness, and nearby components for damage, corrosion, pin push-out, or heat damage
Backprobe sensor connector: check reference voltage (usually 5 V), signal voltage, and ground with key ON and engine OFF/ON where applicable
Check CAN (or LIN/serial) bus voltages at the sensor/module connector and at a known good node: CANH and CANL idle and dominant levels
Inspect fuses/relays that feed the sensor or related modules

Signal parameters

Sensor supply (reference) voltage: typically ~5.0 V (check vehicle spec)
Sensor signal output: typically ~0.5–4.5 V proportional to pressure (0 to max sensor range)
Sensor ground: near 0 V (good continuity to chassis ground)
CAN bus idle voltages: CANH ≈ 2.5 V, CANL ≈ 2.5 V
CAN bus dominant state: CANH ≈ 3.5 V, CANL ≈ 1.5 V (approx. values—confirm with vehicle spec)
Expected data update rate: depends on vehicle (frequent; often multiple times per second)

Diagnostic algorithm

Retrieve trouble codes and freeze frame with a professional scan tool; record any other U- or P-codes
Inspect sensor connector and wiring for obvious damage, corrosion, or water ingress; repair or replace as needed
With harness accessible, backprobe the sensor connector: verify reference voltage, signal voltage, and ground continuity. If reference or ground missing, trace to source (fuse, relay, module) and repair
If sensor has an electrical connector plus a bus (CAN/LIN), check bus wiring: measure CANH/CANL at sensor connector and at a known good node. Look for proper idle and dominant voltages and for bus shorts
If wiring checks OK, monitor live boost sensor data with engine running and perform controlled tests (vacuum/boost change) to confirm the sensor responds; if no response, replace the sensor
If data is missing on the bus but the sensor has proper power/ground and bench-tested signal, suspect a failed sensor module interface or a network wiring fault upstream (splice, gateway). Trace continuity to the controlling module
Perform wiggle test on the harness and connectors while monitoring live data to find intermittent opens or shorts
Clear codes and road test after each repair step to confirm the fault is resolved
If wiring and sensor are confirmed good and other modules on the bus show communication issues, perform network diagnostics (termination resistors, multiple nodes) and consider ECU/gateway replacement only after eliminating wiring/sensor causes

Likely causes

Connector pins pushed out, corroded, or contaminated at the boost sensor
Open or chafed signal/supply/ground wire near harness routing or heat source
Sensor lost 5V reference or ground due to a nearby fuse/relay/wiring fault
CAN bus short or high resistance splice interfering with communication
Recent service (sensor or module replacement) left harness disconnected or incorrectly routed

Fault status

⚠️ Status

Control module reports no valid communication/data from Turbocharger/Supercharger Boost Sensor A. The sensor node is not responding or its data is not being received on the vehicle network.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours