Independent vehicle diagnostics reference9,578 definition records · 11,412 unique codes · 68,396 vehicle evidence records
Search

Diagnostic trouble code

U029D

U029D Fault Code

Home/ Fault codes/ U029D

Car Codes diagnostic trouble code

U029DDiagnostic priority

Lost Communication With NOx Sensor ADiagnostic contextPotentially applicable to OBD-II-compliant vehicles; confirm against vehicle VIN, model year and module.Vehicle applicabilityApplicability varies by vehicle, powertrain, model year and control module.

01

Code interpretation

What U029D means

This code indicates Lost Communication With NOx Sensor A Its precise meaning depends on the reporting control module, complete failure-type suffix, model year, powertrain and software level.

!

Driver experience

Symptoms you may notice

A stored diagnostic trouble code or related system symptom.

?

Test, do not guess

Possible causes

Confirm the reporting module, circuit condition, power supply, wiring, component performance and software status.

Evidence-led checks

Recommended diagnostic route

Save the complete scan, confirm the full code and reporting module, then test using model-specific multi-brand technical information.

  1. Capture the evidenceSave the complete all-module scan, code suffixes and freeze-frame data.
  2. Prove the basicsTest battery condition, system voltage, power and grounds.
  3. Identify the reporterConfirm the module that logged the code and check circuit integrity.
  4. Compare live dataReview commanded and actual values under the conditions that set the code.
  5. Test before replacingUse model-specific wiring diagrams, pin tests and technical information.
  6. Verify the repairClear the code only after recording evidence, then confirm it does not return.

Vehicle fitment

Vehicle applicability

Volvo V60, Volvo XC60, Volvo V90, Volvo XC40, Volvo XC90

Before clearing

Can the code be cleared?

Clearing a code without fixing the cause removes useful evidence and may only switch the warning off temporarily. Save the full scan first; a permanent or repeatedly returning code needs testing.

A DTC is evidence, not a parts order.

Confirm the suffix, reporting module, model, year, engine and live data before replacing a component.

Verified public evidence

Manufacturer and model coverage

22 public manufacturer records match this search. These records support applicability research but do not replace VIN-specific workshop information.

U029DVolvo V60
V60 · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V60
V60 · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V60
V60CC · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V60
V60CC · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V60
V60H · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V60
V60H · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V90
V90 · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V90
V90 · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V90
V90CC · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo V90
V90CC · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC40
XC40 · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC40
XC40 · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC40
XC40BEV · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC40
XC40BEV · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC60
XC60H · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC60
XC60H · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC60
XC60 · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC60
XC60 · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC90
XC90H · 2021 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source
U029DVolvo XC90
XC90H · 2022 · Multiple/unspecified

USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E

Source