Car Mechanics (UK)

En­gine check light

- David Ross Kia Rio · Belgium · Iceland · Belarus

The en­gine check lamp is illuminati­ng in my 2002 Kia Rio 1.3, with the code ‘P0113’ recorded. The descriptio­n I have for this is ‘In­take air tem­per­a­ture sen­sor A circuit high’. If I delete the code, it comes back up as a pend­ing code and then even­tu­ally the check en­gine lamp will come on again.

I fit­ted a new air fil­ter and in­take sen­sor, but it still recorded the same fault code. I then checked the in­put volt­age to the sen­sor, which I found to be 12V. I’m not sure if this is the cor­rect value as I can’t find any spe­cific in­for­ma­tion for the ve­hi­cle. I did think the in­put volt­age should be lower. I also sus­pected there be a fault with the ECU. I sent the unit off to ECU Test­ing, but it isn’t a unit that they can test.

The Kia drives OK, but I won­der if using it with­out solv­ing the prob­lem could cause dam­age. I have checked around the wiring loom for dam­age or cor­ro­sion, but couldn’t find any­thing. I am not re­ally sure what to do next.

Au­to­data has listed one known prob­lem, which con­cerns a poor con­nec­tion to the throt­tle po­si­tion sen­sor. The remedy is to re­move and clean the multi-plug to the throt­tle po­si­tion sen­sor and then re­fit it.

As the code ‘P0113’ refers to the air in­take tem­per­a­ture sen­sor in­put, the most likely cause is ei­ther a poor earth on the air in­take sen­sor or a faulty sen­sor. As you have al­ready re­placed the sen­sor, I would in­spect the con­di­tion of the earth wire. The ac­tual def­i­ni­tion of the code given by Kia is ‘Open or short to bat­tery be­tween IATS sig­nal and ECM, Open be­tween IATS ground and ECM or Faulty IATS’. The Kia lit­er­a­ture also says the volt­age from ter­mi­nal 11 of the ECM should feed the IATS 1-4V and ter­mi­nal 1 which is the ground should read below 1V. If your ECM is feed­ing 12 volts to the IATS then this does im­ply that the ECM is faulty.

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