Getz. Why is it reading 'pressure too low' DTC?

you can check the transmission fluid if its ok and also the transmission pressure

7th generation truck, Cummins.
Cummins ISB 5.9 L inline-six

it is the fuel fume WC super low pressure sensor on top of the tank.
part of the EVAP SMOG systems. for Vent fumes. not fuel raw.

there is fuel level sensor too.

why not tell the problem first, so we can not have to guess 3000 parts in the the truck not working right.
as in whats up doc
getting DTC errors for EVAP
engine lost power, or DTC errors for EFI? or?
OK I found the engine controls schematics on this truck
and I am looking for all sensors (for sure pressure)_
map pressure switch sure. is vacuum not pressure unless boosted induction.
yes ICP is there injector control pressure sensor true name.
I read all 16 PCM pages. so you are talking ICP
the SM says

DTC P1280 indicates injector control signal circuit out of rangelow was detected during KOEO Self Test or during continuous diagnostic monitoring.
and

• biased ICP sensor/PCM
• open ICP sensor circuit
• short to SIG RTN or PWR GND on ICP sensor circuit
• open in VREF circuit
• Disconnect ICP sensor harness connector.
• Key on, engine off.
• Measure voltage between VREF Pin B and battery ground.

Is voltage between 4.5 and 5.5 volts?
then goes on 25 lines of tests and pages. just for this.
I say RTM read the manual and do the 25 tests above

https://eautorepair.net/Marketing/Default.asp

P0450 Evaporative Emission Control System Pressure Sensor ...

www.obd-codes.com > p0450

P0450 Evap Emission System Pressure Sensor Malfunction ... This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to ...

P0450 OBD-II Trouble Code: Evaporative Emission Control ...

www.yourmechanic.com > Articles

P0450 is a diagnostic trouble code (DTC) for "Evaporative Emission Control System Pressure Sensor Malfunction". This can happen for multiple reasons and a ...

P0450 - Evaporative emission (EVAP) pressure sensor ...

www.troublecodes.net > pcodes > p0450

Nov 18, 2015 - The code P0450 is set when the ECM reads a voltage signal lower than ... DTC P0453 Evaporative Emission Control System Pressure Sensor ...

13C-DTC P0450: Evaporative Emission Control System ...

mitsubishitechinfo.com > data > HTML

DTC P0450: Evaporative Emission Control System Pressure Sensor Malfunction. CIRCUIT OPERATION. The ECM (terminal No. 114) supplies a 5 volts ...

What engine ?
Engine Controls and Fuel - 3.5L
Engine Controls and Fuel - 3.9L
Engine Controls and Fuel - 5.3L

DTC P0069: Manifold Absolute Pressure-Barometric Pressure Correlation

Circuit/System Description
The BARO sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The control module supplies 5 volts to the BARO sensor on a 5-volt reference circuit, and provides a ground on a low reference circuit. The BARO sensor provides a voltage signal to the control module on a signal circuit relative to the ambient pressure changes.
The manifold absolute pressure (MAP) sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The control module supplies 5 volts to the MAP sensor on a 5-volt reference circuit, and provides a ground on a low reference circuit. The MAP sensor provides a voltage signal to the control module on a signal circuit relative to the intake manifold pressure changes. The control module compares the BARO sensor to the MAP sensor in order to monitor the BARO sensor operation.


DTC C0899 : Device Voltage Low

Circuit/System Description
The electronic brake control module (EBCM) monitors the ignition voltage level available for system operation. A low voltage condition prevents the system from operating properly.

Circuit/System Testing
Measure the voltage at the battery terminals.
? If less than 12 volts, charge and test the battery.
With a scan tool, read the ignition voltage in the EBCM data list. Verify that battery terminal voltage and ignition voltage readings do not differ more than 1 volt.
? If the difference is more than 1 volt, test the ground circuit of the EBCM for high resistance or replace the EBCM.
If OK, test the charging system.

Your fuel pressure is really low.

PO961Is Pressure Control Solenoid A Control CKT Range/Perf.

Having a qualified repair shop check it out would be your best bet . These light;s being on means DTC'S - dignostic trouble codes are stored .
SERVICE STABILITY SYSTEM
Refer to ABS Description and Operation in Antilock Brake Systems Vehicles with RPO JL4 are equipped with an EBC 430EV ABS/DRP/TCS/VSES module.
This module provides the following vehicle performance enhancement systems.
• Antilock Brake System (ABS)
• Dynamic Rear Proportioning (DRP)
• Traction Control System (TCS)
• Vehicle Stability Enhancement System (VSES)
The following components are involved in the operation of the above systems.
• Electronic brake control module (EBCM) - The EBCM controls the system functions and detects failures.
The EBCM contains the following components.
- System relay - The system relay is internal to the EBCM. The system relay is energized when the ignition is ON. The system relay supplies battery positive voltage to the valve solenoids and to the ABS pump motor. This voltage is referred to as system voltage.
- Solenoids - The solenoids are commanded ON and OFF by the EBCM to operate the appropriate valves in the brake pressure modulator valve (BPMV).
- Longitudinal Accelerometer - The EBCM uses the longitudinal accelerometer to determine the actual straight-line acceleration of the vehicle.
• Brake pressure modulator valve (BPMV) - The BPMV uses a 4-circuit configuration to control hydraulic pressure to each wheel independently.
The BPMV contains the following components.
- ABS pump motor and pump
- Four isolation valves
- Four dump valves
- Two TC isolation valves
- Two TC supply valves
- A master cylinder pressure sensor
- A front low-pressure accumulator
- A rear low-pressure accumulator
• Wheel speed sensors (WSS) - As the wheels spin, toothed rings interrupt magnetic fields in the wheel speed sensors. This causes each wheel speed sensor to generate an AC signal. The EBCM uses these AC signals to calculate the wheel speed. Any imperfections in the toothed ring, such as a missing or damaged tooth, can cause an inaccurate WSS signal.
• Traction control switch - VSES and the engine torque reduction function of TCS are manually disabled or enabled by pressing the traction control switch.
• Lateral accelerometer - The EBCM uses the lateral accelerometer to determine the sideways acceleration of the vehicle. The lateral accelerometer is packaged with the yaw rate sensor as a single component.
• Master cylinder pressure sensor - The master cylinder pressure sensor is located within the BPMV. The master cylinder pressure sensor uses a 5-volt reference and generates an output signal proportionate to the hydraulic fluid pressure which is present in the front brake circuit at the master cylinder.
• Yaw rate sensor - The EBCM uses the yaw rate sensor to determine the rate of rotation along the vehicle's vertical axis. The yaw rate sensor is packaged with the lateral accelerometer as a single component.
• Steering wheel position sensor - The electronic brake control module (EBCM) receives several inputs from the steering wheel position sensor. 3 digital square wave signal inputs are wired directly to the EBCM harness connector, however, only signals A and B are used or monitored. The failure of the index pulse signal does not effect VSES function. The body control module (BCM), which receives an analog steering position sensor input, transmits steering position data on the serial data line. The EBCM monitors the serial data information as an added failsafe for the steering position sensor circuitry. Battery voltage is supplied to the digital portion of the steering wheel position sensor from the cruise control fuse. The analog portion of the steering wheel position sensor is supplied a 5-volt reference from the BCM. This circuit is also used for a lamp dimming function.
• Precharge pump motor and pump - The precharge pump assembly is used to assist the ABS pump in rapidly building hydraulic pressure needed during certain TCS or VSES events
Do you know what DTC'S are ? The ABS , traction control can set a bunch .
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
DTC C0161
DTC C0186
DTC C0196
DTC C0201
DTC C0220
DTC C0221-C0227 or C021 (W/O JL4)
DTC C0221-C0227 or C021 (W/JL4)
DTC C0228
DTC C0229 or C029 (W/O JL4)
DTC C0229 or C029 (W/JL4)
DTC C0235-C0237 or P0609
DTC C0238 or C038
DTC C0240
DTC C0241-C0243
DTC C0244 (W/O JL4)
DTC C0244 (W/JL4)
DTC C0245 (W/JL4)
DTC C0245 (W/O JL4)
DTC C0246-C0254
DTC C0265 or C0266 and C065 or C066
DTC C0267 or C0268 and C067 or C068
DTC C0269 or C0274 and C069 or C074
DTC C0271-C0273, C0284
DTC C0279 (W/O JL4)
DTC C0279 (W/JL4)
DTC C0281 or C081
DTC C0283 (W/O JL4)
DTC C0283 (W/JL4)
DTC C0287, P1644, or P1689
DTC C0290 or C0292 (W/O JL4)
DTC C0290 or C0292 (W/JL4)
DTC C0291
DTC C0297
DTC C0298 or P1571
DTC C0455
DTC C0472 or C0473
DTC C0550
DTC C0558

You need to reset the low tire pressure fault waring, this can be a defective sensor. Read the procedure below.
Replace sensors as required.
Clear DTCs by grounding DLC (under dash in front of driver) terminal 6 to 5, three times in ten seconds.
Receiver/control module will confirm that its memory has been cleared by illuminating both the "L0W/FLAT TIRE" and "SERVICE LTPWS" lamps at the same time. Both lamps will remain ON until the ignition is turned to the OFF position and then back to "ON".

RF sensor MUST be color code BLUE.
If you still get codes, read out the DTCs by connecting DLC terminal 6 to 5 to flash LTPWS. Look for 23, 33, 43, 53 or 24, 34, 44, 54. Right front is LOW TIRE DTC 53 and WHEEL SENSOR DTC 54.

All codes will be preceded with DTC 12. DTC 99 is possible receiver fault.

P0107 -- CONTINUOUS
Continuous diagnostic trouble code P0107 indicated barometric pressure out of range low was detected during normal operation.

Possible cause - faulty internal BARO sensor (PCM)

Perform KOEO On-Demand Self Test. Is P0107 present?
Yes, REPLACE PCM. CLEAR DTC and RETEST.
No, P0107 is intermittent fault. CLEAR DTC. If DTC reappears, REPLACE PCM.

If you keep getting it, a new PCM is the only fix.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

It could just be a bad signal from the MAP sensor or a poor connection at the sensor. Or a bad MAP sensor itself. Maybe the vacuum line is off or broken.

Manifold Absolute Pressure (MAP) sensor measures the changes in the intake manifold pressure which result from engine load and speed changes, and converts this measurement into a voltage output.

A closed throttle on when the engine is decelerating would produce a relatively low MAP output, while a wide open throttle would produce a high output. Manifold absolute pressure is the opposite of what you would measure on a vacuum gage. When manifold pressure is high, vacuum is low. The MAP sensor is also used to measure barometric pressure under certain conditions, which allows the PCM to automatically adjust for different altitudes.

The PCM sends a 5 volt reference signal to the MAP sensor. As the manifold pressure changes, the electrical resistance of the sensor also changes. By monitoring the sensor output voltage, the PCM can determine the manifold pressure. A higher pressure, low vacuum (high voltage) requires more fuel, while a lower pressure, higher vacuum (low voltage) requires less fuel.

A high or low voltage fault in the MAP sensor circuit should set a DTC P0107 or DTC P0108. If the MAP sensor sends an intermittent zero voltage signal to the PCM, a DTC P0106 will set.