Check engine light on

Tiny
ATHOMAS99
  • MEMBER
  • 2001 MAZDA PROTEGE
  • 4 CYL
  • AUTOMATIC
  • 11,000 MILES
I recently got this car, and I do not really know much about cars. But the check engine light was on so I took it to Autozone and two codes popped up. The codes were p1250 and p1569. I am wondering what these two codes could potentially mean and what the price range to fix it would be?
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Wednesday, April 12th, 2017 AT 5:34 PM

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Tiny
CARADIODOC
  • EXPERT
P1250 Mazda - Fuel pressure regulator control valve circuit fault.

Possible causes:

Faulty Fuel Pressure Regulator Control Valve
Fuel Pressure Regulator Control Valve harness is open or shorted
Fuel Pressure Regulator Control Valve circuit poor electrical connection

P1569 MAZDA - VTCS Solenoid Valve Circuit Low Input

Possible causes:

Faulty Variable Tumble Control System (VTCS) Solenoid Valve
VTCS Solenoid Valve harness is open or shorted
VTCS Solenoid Valve circuit poor electrical connection

My experience has been wiring and connector terminal problems cause more electrical problems than the sensors and valves. These codes refer to detecting electrical circuit faults, not mechanical problems which are caused by valves. Also, when there are two codes referring to electrical problems, start by suspecting they have a common cause.

We do not get involved with costs here because there are way too many variables. We do not even know what is wrong yet, or how long it will take to find the causes of the problems or repair them.
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Wednesday, April 12th, 2017 AT 5:48 PM
Tiny
STEVE W.
  • EXPERT
Mazda- P1250 - Pressure regulator control solenoid circuit : Try a simple disconnect/reconnect to see if it is just corroded contacts. The solenoids do fail as well. Simple part to replace. Video showing the testing of a similar unit, but it is just as easy to just replace the valve.
https://www.youtube.com/watch?v=ucOq-83Hv2Y

Mazda- P1569 - Intake manifold air control - circuit low - this can take a bit more work to test. But again the first thing would be to check the connections because it is an older vehicle.

Cost of repair depends a lot on what is found during testing.
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Wednesday, April 12th, 2017 AT 6:00 PM

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