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Hello, so I have got 4 warning lights on the engine check light, tpms, sbs, Dsc, but when I plug my reader in it only comes up with one fault - exhaust pressure sensor circuit A low, also the car is running ok can anyone help or shine some light please
 

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I've found most low sensor input voltages over the years have been due to a bad battery, with poor electrical grounds coming second.
 
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