U068C
Lost Communication With Pedestrian Protection Control ModuleU068C is a generic OBD-II network diagnostic trouble code: Lost Communication With Pedestrian Protection Control Module. It is logged by the engine control unit when the network monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What U068C means
U068C is stored when a network module no longer receives the expected periodic messages from the Pedestrian Protection Control Module. Pedestrian protection systems use front-impact sensors or accelerometers to detect a pedestrian collision and trigger active hood lifters or external airbag deployments to reduce injury severity. The control module communicates its armed and ready status over the CAN bus so the central airbag or body control module can monitor system health.
Loss of communication means the primary safety module cannot confirm the pedestrian protection system is operational. In many regulatory markets a vehicle sold with this system must keep it functional; an illuminated MIL related to this system can trigger a safety inspection failure. The pedestrian protection module is typically located at the front of the vehicle near the bumper beam, making it susceptible to collision damage, road debris, and moisture ingress.
Diagnostic priority should be given to physical inspection of the module and its wiring. Always disable the system per manufacturer procedure before probing connectors near deployable actuators to prevent accidental deployment.
Common causes
Most-frequently reported root causes when U068C is logged.
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1
Impact damage to the module from a minor collision or road debris strike.
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2
Water or mud ingress into the module housing at the front of the vehicle.
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3
Corroded or poorly seated module harness connector.
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4
Open circuit in CAN bus wiring in the front harness section.
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5
Module power supply disrupted by a blown fuse or damaged feed wire.
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6
Internal module failure.
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7
Incorrect or incompatible module fitted after a front-end repair.
Symptoms drivers notice
How to diagnose U068C
A typical diagnostic flow when this code is present.
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1
Before probing any connector, disable the supplemental restraint and pedestrian protection system per manufacturer procedure to prevent accidental deployment.
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2
Retrieve and document all DTCs from all modules.
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3
Inspect the front bumper area and module housing for signs of impact or water damage.
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4
Verify module supply voltage and ground at the connector with the system disabled.
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5
Check CAN bus wiring continuity from the module connector to the next node.
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6
Inspect the module connector for corrosion, bent pins, or water contamination.
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7
Replace the module only after confirming wiring and power supply are fault-free.
Related network codes
- U0601 — Lost Communication With Tire Pressure Monitor Module
- U0603 — Lost Communication With Navigation Control Module
- U0609 — Lost Communication With Manifold Absolute Pressure Sensor "A"
- U060B — Lost Communication With Turbocharger/Supercharger Boost Sensor "A"
- U060F — Lost Communication With Body Control Module J
- U0619 — Lost Communication With Steering Angle Sensor Module
Frequently asked questions
Is it safe to probe connectors near pedestrian protection actuators?
No, not without first following the manufacturer disarm procedure; live actuator circuits can deploy hood lifters or external airbags, causing injury.
Can a minor fender-bender cause U068C?
Yes. Even a low-speed impact can displace the module, damage its connector, or trigger an internal fault that sets the lost-communication code.
Does U068C affect airbag deployment in a crash?
U068C specifically covers pedestrian protection; the main airbag system has its own modules and codes, but both systems should be verified after any restraint-domain code is found.
Is U068C common on vehicles without pedestrian protection?
No. The code will only be set by a module that expects messages from a pedestrian protection unit; vehicles not equipped with the system would not configure this monitor.
Disabling U068C in software
RaceTune can permanently disable U068C — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
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