Non catalyst: pre-2018 MOT
This is pre-2018 MOT wording. The defect categories changed on 20 May 2018.
Now called Non catalyst emissions.
8 pre-2018 fail items.
| Old wording | Inspection manual | Now |
|---|---|---|
| Non catalyst emissions carbon monoxide content excessive | the exhaust gas contains a carbon monoxide content exceeding the limit for a continuous period of 5 seconds | Non catalyst emissions emissions carbon monoxide content excessive (major) |
| Non catalyst emissions hydrocarbon content excessive | excessive hydrocarbon content exceeding the limit for a continuous period of 5 seconds | Non catalyst emissions emissions hydrocarbon content excessive (major) |
| Non catalyst engine idle speed too high | the engine is idling at a speed clearly above its normal idling speed | Non catalyst emissions emissions - engine idle speed too high (major) |
| Non catalyst emits dense blue smoke at idle | emits dense blue or clearly visible black smoke for a continuous period of 5 seconds at idle | Non catalyst emissions emits dense blue smoke at idle (major) |
| Non catalyst emits visible black smoke at idle | emits dense blue or clearly visible black smoke for a continuous period of 5 seconds at idle | Non catalyst emissions emits visible black smoke at idle (major) |
| Non catalyst emits clearly visible black smoke during acceleration | emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users | Non catalyst emissions emits clearly visible black smoke during acceleration (major) |
| Non catalyst emits excessive dense blue smoke during acceleration | emits excessive dense blue or clearly visible black smoke during acceleration which would obscure the view of other road users | Non catalyst emissions emits excessive dense blue smoke during acceleration (major) |
| Non catalyst tailpipe not capable of allowing the emission probe to be inserted | the emissions cannot be measured because a tailpipe accessory is fitted which prevents insertion of the analyser probe | Non catalyst emissions emissions hydrocarbon content excessive (major) |
Current names are the closest match by wording and part. The DVSA publishes no official old-to-new table.
Other pre-2018 parts in Exhaust, Fuel and Emissions
Dabers ANPR shows the full MOT history, defects included, for the car in any photo. How it works
Add to ChromeContains public sector information from the DVSA licensed under the Open Government Licence v3.0.