alfa romeo gt 1.9 jtd 16v ERROR CODES

[bluecar]

hi,
own a alfa romeo gt 1.9 jtd, 16v, and for some time and my error is this:
1: P0235 - Boost pressure sensor
Boost control solenoid or boost pressure sensor faulty
The reason for this fault is that ECU has received very high signal from the sensor. The fault is not detected now, but it is stored in memory. Clear fault codes, and observe for future appearance of the same fault. Dashboard warning light was activated for this fault.
2: P0238 - Boost pressure sensor
Boost control solenoid or boost pressure sensor faulty
The reason for this fault is that ECU has received very high signal from the sensor. The fault is not detected now, but it is stored in memory. Clear fault codes, and observe for future appearance of the same fault. Dashboard warning light was activated for this fault.




I changed the solenoid valve but still occurs sometimes when the engine reaches between 2800-3200 rpm. after changing the solenoid valveacestia are parameters ecuscan read:

READING PARAMETERS:
Odometer: 0,0 km
Engine overrevs: 11
Max. engine speed time: 3610 ms
Max engine speed: 5840 rpm
Odometer at last programming: 0,0 km
Engine speed: 852 rpm
Engine temperature: 61,2 °C
Fuel pressure regulator duty cycle: 15,75 %
High pressure regulator current: 634 mA
Desired intake air quantity: 310,2 mg/i
Intake air quantity: 311,7 mg/i
EGR duty cycle: 36,07 %
Baro pressure: 1009 mBar
Air temperature: 12,3 °C
Vehicle speed: 0,00 km/h
Battery voltage: 14,13465 V
Fuel temperature: 14,1 °C
Boost control solenoid valve opening: 75,00 %
Water temperature signal: 2,121 V
Inj. correction Cyl. 3: -0,32 mm³/i
Air temperature (Boost/Manifold): 36,5 °C
Inj. correction Cyl. 4: 0,41 mm³/i
Gas pedal position: 0,0000 %
Gas pedal position signal (Track 1): 0,714 V
Gas pedal position signal (Track 2): 0,362 V
Total fuel quantity: 5,37 mm³/i
Inj. correction Cyl. 1: -0,06 mm³/i
Inj. correction Cyl. 5: mm³/i
Inlet circ. throttle solenoid valve: 1,00 %
Desired fuel pressure: 270,0 bar
Fuel pressure: 265,9 bar
Desired boost pressure: 1000 mBar
Boost pressure: 1002 mBar
Boost pressure signal: 1,613 V
Inj. correction Cyl. 2: -0,05 mm³/i
Cooling fan PWM control: 0,00 %
A/C pressure: bar
Baro pressure signal: 3,988 V
Air temperature signal: 3,016 V
Air temperature signal (Boost/Manifold): 2,634 V
Air quantity signal: 1,994 V
Fuel temperature signal: 3,622 V
Injection time: 0,637 ms
Injection timing: 0,00 deg.
Air control inhibition: Air control ON
A/C System: Yes
Boost pressure command/control: No
Cruise control resume button (RCL): Released
Cruise control dec. (-): Released
Cruise control incr. (+): Released
Cruise control status: Cruise control
Water in fuel filter: No
Synchronization status: Synchronized engine
Quadrinary: OFF
Trinary: OFF
Universal code: Not enabled
Fuel filter heater: OFF
Cruise control: Pressure on pipe
Engine start permission: Allowed
Glow plug heater module: OFF
A/C Request: OFF
Oil pressure: OK
Brake light switch: OFF
A/C compressor relay: OFF
Clutch pedal switch: OFF
Brake pedal switch: OFF
Fuel pump relay: ON
A/C unit fan: OFF
Cruise control switch: OFF
Gas pedal signal status:
Injector code Cyl. 1: A8IIFGAAA
Injector code Cyl. 2: A1IIFYAAA
Injector code Cyl. 3: AR1EAYAAA
Injector code Cyl. 4: 8HHID3AAA
Injector code Cyl. 5:

can anyone tell me if the parameters are correct? Thank you!

and 2000 rpm


READING PARAMETERS:
Odometer: 0,0 km
Engine overrevs: 11
Max. engine speed time: 3610 ms
Max engine speed: 5840 rpm
Odometer at last programming: 0,0 km
Engine speed: 2206 rpm
Engine temperature: 75,7 °C
Fuel pressure regulator duty cycle: 23,42 %
High pressure regulator current: 1001 mA
Desired intake air quantity: 407,0 mg/i
Intake air quantity: 407,5 mg/i
EGR duty cycle: 41,74 %
Baro pressure: 1009 mBar
Air temperature: 20,2 °C
Vehicle speed: 0,00 km/h
Battery voltage: 14,11510 V
Fuel temperature: 17,5 °C
Boost control solenoid valve opening: 62,43 %
Water temperature signal: 1,574 V
Inj. correction Cyl. 3: 0,30 mm³/i
Air temperature (Boost/Manifold): 49,7 °C
Inj. correction Cyl. 4: 0,22 mm³/i
Gas pedal position: 10,5530 %
Gas pedal position signal (Track 1): 1,295 V
Gas pedal position signal (Track 2): 0,655 V
Total fuel quantity: 6,46 mm³/i
Inj. correction Cyl. 1: -0,33 mm³/i
Inj. correction Cyl. 5: mm³/i
Inlet circ. throttle solenoid valve: 1,00 %
Desired fuel pressure: 593,0 bar
Fuel pressure: 595,5 bar
Desired boost pressure: 1076 mBar
Boost pressure: 1382 mBar
Boost pressure signal: 2,199 V
Inj. correction Cyl. 2: -0,20 mm³/i
Cooling fan PWM control: 0,00 %
A/C pressure: bar
Baro pressure signal: 3,988 V
Air temperature signal: 2,634 V
Air temperature signal (Boost/Manifold): 2,053 V
Air quantity signal: 2,889 V
Fuel temperature signal: 3,470 V
Injection time: 0,427 ms
Injection timing: 2,86 deg.
Air control inhibition: Air control ON
A/C System: Yes
Boost pressure command/control: No
Cruise control resume button (RCL): Released
Cruise control dec. (-): Released
Cruise control incr. (+): Released
Cruise control status: Cruise control
Water in fuel filter: No
Synchronization status: Synchronized engine
Quadrinary: OFF
Trinary: OFF
Universal code: Not enabled
Fuel filter heater: OFF
Cruise control: Pressure on pipe
Engine start permission: Allowed
Glow plug heater module: OFF
A/C Request: OFF
Oil pressure: OK
Brake light switch: OFF
A/C compressor relay: OFF
Clutch pedal switch: OFF
Brake pedal switch: OFF
Fuel pump relay: ON
A/C unit fan: OFF
Cruise control switch: OFF
Gas pedal signal status:
Injector code Cyl. 1: A8IIFGAAA
Injector code Cyl. 2: A1IIFYAAA
Injector code Cyl. 3: AR1EAYAAA
Injector code Cyl. 4: 8HHID3AAA
Injector code Cyl. 5:

[alfa156sarajevo]

For me those parameters look OK!

[Aron96]

Hello Bluecar, and perhaps have a car that you have always bought used or lai, a friend of mine that had happened and the engine control unit with software changed and always gave the same mistake as you also changed p0235 solenoid valve but it was always and then you read the unit and we have set up with an original file of the unit the car and changed power but did not give him the mistake, please check if the software is the original

[bluecar]

is possible that this problem be and the MAF sensor?

[Aron96]

You can do a test with multiecuscan to see the maf with real value and the expected value of the unit

[bluecar]

hi,
this error does not occur all the time, there are days when the car goes very well.i changed Boost pressure sensor and boost control solenoid (Pierburg), I cleaned throttle, map sensor and egr but still error occurs.

[Aron96]

please read the software of the control unit and compare it with an identical to your