Rough idle, losing pressure and codes P0236 and P0237

Tiny
VOLVO GIRL
  • MEMBER
  • 2001 VOLVO C70
  • 2.3L
  • TURBO
  • AUTOMATIC
  • 133,000 MILES
My car has a very rough idle. It's been losing pressure a lot. It loses pressure to the point where I have to pull over and restart my car to regain the pressure. I recently had a diagnostic ran on it at AutoZone and the only codes that were triggered were p0236 and p0237. It said that I needed to replace the Manifold Absolute Pressure (MAP) Sensor. The thing is, the ETS (electronic throttle system) light is also on in the dashboard of my car. However, the diagnostic didn't say anything about that. Could the MAP sensor be causing the ETS light to come on? Or could the ETS be causing an error code on the diagnostic pertaining to the Manifold Absolute Pressure Sensor? I'm working on replacing the MAPS sensor at the moment, however, the throttle is a pretty expensive repair and I don't want to replace it if it isn't needed. I need a professional opinion.
Thursday, April 30th, 2020 AT 11:57 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

Both of these codes are related to the boost pressure sensor. If the sensor is bad, the computer will compensate by reducing the pressure.

Take a look at pic one. It shows the codes you mentioned and potential causes. Pic 2 shows location. Is this the component location. Let me know if this has been checked or replaced.

Joe
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Friday, May 1st, 2020 AT 9:35 AM

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