2001 Volvo V70 XC Logo
Katie Brock Posted on May 17, 2014
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What do codes P1175 & P1237 actually mean? Why are there so many options to choose from? How can I actually repair it?

My car has stalled a handful of times, only while at a very low rate of speed turning, and to nearly stopping. No other issues until the check engine light came on and threw two codes P1175 & P1237. I have looked online and found too many different results for these codes and have no idea what issue to pick! For P1175; Is it a Cam Control Fault, a Long-term fuel trim Lower Limit, or a Fuel Trim Adaptation Inactive Bank 2 Malfunction? For P1237; is it a Fuel Pump Secondary Circuit Malfunction, an accelerator position sensor, a Turbo Boost Solenoid, or a Turbocharger control system flow fault Flow too low? I am lost and need to fix this so I can get through emissions testing. Thanks in advance!

1 Answer

Bill Boyd

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  • Volvo Master 53,816 Answers
  • Posted on May 17, 2014
Bill Boyd
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The ECM has numerous sensors that are read continuously and these results are checked against pre-set parameters in the CPU memories. Every possible cause of a fault code is an associated sensor that is being affected by the fault so there are several possible reasons that cause the fault . That is to say wiring is a possible cause ---the unit itself is another possible cause---low /high voltage is another and so on. Take it to a service centre as with most makes of vehicles there is a common fault problem that experienced technicians are aware of and can pin point quickly. As with advice from readers the causes are general areas of advice to look at so if it appears confusing then take it to an experienced shop.

Testimonial: "Thank you for your reply. I appreciate your time in responding to my query. I am specifically asking about the two codes P1175 & P1237. When looking the codes up I find the codes describe 7 very different issues. Where can I find 1 accurate answer to each code, without going to the dealer?"

  • Katie Brock May 20, 2014

    Oops, I meant to post this here, not in testimonials area... "Thank you for your reply. I appreciate your time in responding to my query. I am specifically asking about the two codes P1175 & P1237. When looking the codes up I find the codes describe 7 very different issues. Where can I find 1 accurate answer to each code, without going to the dealer?"

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