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RostaT · May 20th, 2019, 08:22

Hello to all members!
Im facing similar issue right now.
My symptoms are noticable just sometimes and only on highway. After cruising at constant speed, when I want to accelerate, I have minimal throttle response. After 15-20 seconds car starts accelerating like usual and everything is okay. No "check engine'" light, no hesitation during accelerating in lower speed. No need to switch off the engine.

Volvo dealer's diagnostic tool showed Exhaust temperature sensor 1, exhaust temperature sensor 2 (before and after DPF) and also O2 sensor. For temperature sensors signal it shows some general malfunction like for example P054400 and for O2 sensor it show "Low frequency".

Dealer's guys told me, O2 sensor malfunction is probably caused by temperature sensors failure.

Did you guys experienced failure of both temperature sensors at the same time? Is it common?

Thanks!!!

May 20th, 2019, 08:22	#74
RostaT New Member Last Online: May 31st, 2019 11:56 Join Date: May 2019 Location: Belotin	S60 D3 2012 temperature sensors Hello to all members! Im facing similar issue right now. My symptoms are noticable just sometimes and only on highway. After cruising at constant speed, when I want to accelerate, I have minimal throttle response. After 15-20 seconds car starts accelerating like usual and everything is okay. No "check engine'" light, no hesitation during accelerating in lower speed. No need to switch off the engine. Volvo dealer's diagnostic tool showed Exhaust temperature sensor 1, exhaust temperature sensor 2 (before and after DPF) and also O2 sensor. For temperature sensors signal it shows some general malfunction like for example P054400 and for O2 sensor it show "Low frequency". Dealer's guys told me, O2 sensor malfunction is probably caused by temperature sensors failure. Did you guys experienced failure of both temperature sensors at the same time? Is it common? Thanks!!!