DOCUMENTED DIAGNOSTIC CONTEXT

Diagnostic code articles — Page 40.

Understand what the recorded fault means, which findings change the diagnosis, and what the cited documentation can confirm. Each article states the system or vehicle scope it covers.

Some sources leave details unresolved. Those articles include a visible source note; a code match alone does not establish applicability to your vehicle.

telematics positioning data fails protection validation

particulate sensor data fails counter and protection checks

battery monitor rolling counters fail on the LIN interface

Aviator gearshift data faults with multiple door-latch warnings

Remote-park data validity has an application-specific boundary

radar rejects protected host-vehicle path information

processor-2 data-group integrity failures

video-processing messages arrive with invalid protection

Invalid infotainment data reported by SAIC's brake controller

Special-purpose module data must be judged against the actual upfitter configuration

Gladiator rear-camera data without a picture fault

automatic-braking message rolling counter fails at the brake controller

Camera data arrives with invalid integrity or freshness

grille shutter A initialization-status counter is invalid

grille shutter B initialization-status data fails its counter check

Hybrid drive-controller torque or gear messages fail integrity checks

Ram eTorque data fault with an incompletely seated MGU connector

DC/DC converter voltage and crank-status messages fail validation

engine-out NOx sensor A data fails protection checks

post-catalyst NOx sensor B information fails integrity checks

The upstream NOx sensor rejects invalid or late PCM information

Tailpipe NOx invalid-data faults require message context

third NOx sensor messages fail counter or checksum validation

Charge-air cooler pump messages fail the alive-counter check

Digital oil-pressure communication needs a SENT-specific interpretation

digital filter-pressure sensor SENT communication fails

throttle sensor 1 SENT communication is invalid

throttle sensor 2 sends unusable SENT information

Throttle B uses a position channel named C in this Ford monitor

the air-flow sensor loses particular LIN messages

Mass-airflow sensor B communication timing failures

Intake-air temperature sensor 1 communication faults

Resolve the sensor-name mismatch before locating the communication fault

Intake-air temperature sensor 2 and shared communication events

Ram coolant-valve communication loss with connector corrosion

coolant bypass valve C SENT data becomes stale

Missing LIN response from coolant bypass valve D

exhaust temperature sensor 1 loses valid SENT communication

exhaust temperature sensor 2 SENT messages are invalid or stale

the auxiliary water pump stops communicating on LIN

fuel-rail pressure sensor communication stays low

Coolant pump C missing its low-temperature-loop LIN response

cooling fan 1 misses its LIN communication deadline

cooling fan 2 fails to return its LIN response

The exhaust heat-exchanger bypass actuator stops replying on LIN

coolant flow valve SENT position stream fails protocol checks

Wastegate position sensor A SENT communication failure

Ram active air-dam communication and connector condition

intake runner swirl-position SENT protocol failure

exhaust pressure valve position feedback loses valid SENT updates

high-pressure EGR position sensor A SENT communication fails

low-pressure EGR position sensor C communication failure

diesel intake throttle position SENT data becomes unusable

variable-geometry turbo position feedback loses valid SENT data

left-front temperature actuator response missing on LIN

right-front climate actuator timeout with an applicability caveat

A fresh-air duct communication fault on SKYACTIV-X

Bank 2 fuel-rail pressure sensor SENT signal loss

low-pressure EGR differential-pressure sensor loses SENT data

fuel-temperature sensor A loses SENT pulse traffic

sensor B fuel-temperature communication needs polarity confirmation

Engine coolant pump LIN communication timeout

Wastegate-position sensor B loses its SENT signal

why the cooling-fan 3 LIN response is missing

Barometric pressure sensor B communication events

Throttle-position sensor G SENT communication failure

Barometric pressure sensor C and source-specific communication labels

SENT communication failure and an EGR sensor-label mismatch

Humidity sensor SENT error reports

when a downstream pressure sensor stops communicating

exhaust-temperature sensor 3 message loss

Exhaust-temperature sensor 4 SENT communication faults

why the module and failure subtype matter

2021 F-150 steering-assist loss after low-voltage starting

missing VIN programming versus a VIN mismatch

module supply voltage outside its allowed window

The BCM is checking accessory-relay output voltage

Brake-controller input power A undervoltage paths

Brake-controller input power B and redundant-supply faults

Ground-path A imbalance detected by the brake controller