Member Since: 05 May 2016
Location: hertfordshire
Posts: 250
HELP! - all ok and now a host of codes.....
Anyone have any experience of the below barrage of codes?
14th Jan 2022 2:07 pm
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4540
The only one that counts is the first one. Ignore the 'U' codes.Richard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
14th Jan 2022 2:10 pm
will.i.am
Member Since: 05 May 2016
Location: hertfordshire
Posts: 250
thanks pal, nice to know the U ones are irrelevant. any ideas what the others would be?
i have checked the actuator and its moving freely in both ways, also moves when you turn on ignition. Im getting 230kpa or just above when driving so I don't think i've got a loose boost pipe on that.
im not sure what the TC code is though.....
14th Jan 2022 2:13 pm
grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6415
P023D-21
aka P023D21
Description
Manifold absolute pressure (MAP) sensor/right-hand turbocharger boost sensor correlation - signal amplitude less than minimum
Meaning
The turbocharger boost pressure the engine ECU (PCM) is seeing is less than the minimum it was expecting. So the turbo is underboosting.
Causes
Intake air system fault
Turbocharger mechanical fault
Oil ingestion into manifold
Resolution
Check the intake air system.
Check the turbocharger mechanical condition and operation.
Check for oil being drawn into the intake manifold.
Rectify as necessary.
Using a data logger function, monitor the turbocharger actuator position and command the actuator to 5% pulse width modulated (PWM), then 95% pulse width modulated (PWM) in 5% steps. Check the results. There should be a smooth curve between the minimum and maximum values. If not, install a new turbocharger.
Clear the DTCs and test for normal operation.
Notes
May be sticky turbocharger actuator arm?
Top air hose into front of engine split
P023D-22
aka P023D22
Description
Manifold absolute pressure (MAP) sensor/right-hand turbocharger boost sensor correlation - signal amplitude greater than maximum
Meaning
The turbocharger boost pressure the engine ECU (PCM) is seeing is more than the maximum it was expecting. So the turbo is overboosting.
Causes
Intake air system fault
Turbocharger mechanical fault
Intake air temperature (IAT) sensor fault
Mass air flow (MAF) sensor fault
Manifold absolute pressure and temperature (MAPT) sensor fault
Exhaust gas recirculation (EGR) sensor fault
Turbocharger actuator position sensor fault
Resolution
Check the intake air system.
Check the turbocharger mechanical condition and operation.
Check for DTCs indicating a listed sensor fault.
Rectify as necessary.
Using a data logger function, monitor the turbocharger actuator position and command the actuator to 5% pulse width modulated (PWM), then 95% pulse width modulated (PWM) in 5% steps. Check the results. There should be a smooth curve between the minimum and maximum values. If not, install a new turbocharger.
Clear the DTCs and test for normal operation.
Notes
May be sticky turbocharger actuator arm?
14th Jan 2022 2:15 pm
grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6415
Member Since: 05 May 2016
Location: hertfordshire
Posts: 250
im poretty sure that hoses etc are ok as they are relatively new silicon hoses but i will check them all. before i go down the route of checking the turbo, does anyone think it could be a map sensor issue? - if so that would be an easy replacement....just not too sure how to check it.
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