A 2021 Opel Vauxhall Movano 2.3L Diesel arrived with a check engine light and code P0400-00, pointing to an EGR valve issue. Diagnostics confirmed the valve wasn’t functioning properly. After verifying wiring and applying direct voltage, the faulty EGR valve was replaced. A road test confirmed the fix—no more check engine light or returning fault codes.

Monitored live data using a scan tool to shed light on the low flow warning. Found the exhaust gas recirculation valve was inoperative. No loose connections or signs of damage were found on the surface, but after removing the valve, it was clear clogged carbon was the true culprit of the Ford Mondeo’s low flow.

A Scan tool revealed code P1206 – Diesel Particulate Filter Efficiency Below Threshold, and after monitoring live data the filter pressure sensor signal revealed erratic parameters. This indicates a potential fault in the sensor or circuitry. Continue reading to discover the multi-meter tests and other procedures used to complete the fix.

Trouble code P0597-00 indicates an Engine Coolant Thermostat, Cooling system error. But what is the fix when the coolant level and condition show no faults? An infrared thermometer is used to identify temperature below specification in the housing inlet and outlet. This communicates an opening is present, so the next steps are to verify the faulty part and replace it.

With the initial warning brake light on, it was clear some mechanism within the electric parking brake was causing the illumination. Using a scan tool, the code U1219 highlighted the permanent fault that the automatic release was experiencing. By leveraging live data monitored on the scan tool, it was found that the parking brake switch data and the pressing of the switch were not in sync. Continue reading this real fix for the remedy and part replacement procedure.

Even with a DTC indicating low engine oil, the fix is not always apparent on the surface level. This 2019 Stelvio had an oil-level sensor signal wire exhibiting erratic signals to the lab scope. The sensor was proved to be the true culprit of the P250F trouble code. Read the full real fix to learn the proper diagnostic steps to take.

This 2018 Opel Vauxhall Insignia presented a mysterious fault code corresponding to the accelerator pedal position sensor voltage. Monitoring live data presented from the scan tool, allowed the technician to see that the signal parameter was intermittently dropping out. But the enigma persisted after further testing, as no loose connections or signs of damage were found. Continue reading this real fix to discover the diagnosis that lead to the fix.

Initially the Exhaust Gas Recirculation Valve (EGR) on this 2019 Opel/Vauxhall Vivaro indicated a parameter mismatch on the scan tool between the actual and desired valve position, yet no signs of damage was apparent on the connector and terminals. After further diagnosis, the EGR measured proper specifications but it wasn’t until the “hood was opened” to reveal the real culprit of carbon clogging the valve.

The real fix on this 2019 Peugeot Boxer’s NOx sensor began diagnostic testing with a scan tool to identify proper specifications for the signal compared to the actual signal omitting from the NOx. With the signal parameter above specifications but with present voltage, no damage or short, the community came to the conclusion that the sensor itself was faulty and was able to quickly return the vehicle to safe operating condition after the replacement.