Kia Amanti Ignition failure sensor

DTC P2138: Accelerator Pedal Position (APP) Sensor 1-2 Correlation

P2138
• The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 0.23 volt, 0.25 volt for LLT, with the pedal released.
• The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 0.29 volt, 0.31 volt for LLT, with a partially pressed pedal.
• The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 1.66 volts, 1.70 volts for LLT, with a fully pressed pedal.
• Any of the above conditions exist, then a 5 second delay for MIL ON.

Diagnostic Aids
Test the current output of the 5-volt reference circuits if you suspect high resistance in the circuit. The current output should be greater than 80 mA for APP 1 and greater than 50 mA for APP 2.


If you don't know how to test the 5 volt reference circuits you need to take it to a qualified repair shop.


Circuit/System Verification
Ignition ON, observe the DTC information with a scan tool. DTC P0651, P0652, P0653, P0697, P0698, or P0699 should not be set.
? If a DTC is set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699.
Observe the scan tool APP Sensor voltage parameters. Verify both of the APP sensor voltages are between 0.74-4.82 V.
Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the procedure several times. DTCs P2122, P2123, P2127, P2128, or P2138 should not set.
Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times. DTCs P2122, P2123, P2127, P2128, or P2138 should not set.
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the ECM.
Disconnect the harness connector at the accelerator pedal assembly.
Test for less than 5 ? between the appropriate low reference circuit of the APP sensor and ground.
? If greater than the specified range, test the low reference circuit of the APP sensor for a short to voltage, or an open/high resistance. If the circuit/connections test normal, replace the ECM.
Install the fuse that supplies B+ to terminal 56-X2 of the ECM.
Note: The 5-volt reference circuit voltage can be within the specified range with a high resistance in the circuit. If this condition is suspected, refer to Diagnostic Aids.
Ignition ON, test for 4.8-5.2 V between the appropriate 5-volt reference circuit of the APP sensor and ground.
? If less than the specified range, test the 5-volt reference circuit for a short to ground or open/high resistance. If the circuit/connections test normal, replace the ECM.
? If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.
Observe the appropriate scan tool APP sensor voltage parameter. Verify the voltage is less than 0.3 volt.
? If greater than the specified range, test the signal circuit of the applicable APP sensor for a short to voltage. If the circuit/connections test normal, replace the ECM.
Connect a 3 A fused jumper wire between the appropriate signal circuit and the 5-volt reference circuit of the APP sensor. Verify the APP sensor voltage parameter is greater than 4.8 V.
? If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit/connections test normal, replace the ECM.
? If both APP sensor voltage parameters display greater than 4.8 V test the signal circuits of the APP sensors for a shorted together condition. If the circuit/connections test normal, replace the ECM.
If all circuits/connections test normal, test or replace the accelerator pedal assembly.

DTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

This is right out of factory service repair manual , don't google stuff may not be accurate.
If you look under the steering wheel at the gas pedal you will see connectors at the Accelerator Pedal . position sensors inside gas pedal .

Circuit/System Description
The throttle actuator control (TAC) system uses two accelerator pedal position (APP) sensors to monitor the accelerator pedal position. The APP sensors 1 and 2 are located within the pedal assembly. Each sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit.
Two processors are also used to monitor the TAC system data. Both processors are located within the engine control module (ECM). Each signal circuit provides both processors with a signal voltage proportional to pedal movement. The processors share and monitor data to verify that the indicated APP calculation is correct.

It's not see wide open throttle like other guy says .

P2127
The ECM detects that APP sensor 2 voltage is less than 0.16 volt for greater than 0.5 second.


Action Taken When the DTC Sets
• DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.
• The ECM commands the TAC system to operate in Reduced Engine Power mode.


Anytime the vehicle goes into reduced engine power mode A/C shuts off - cruise control won't work etc..

Just change the gas pedal assembly .

You need a good auto-electrician to diagnose and fix that lot!

What the P2422 code means. The P2422 diagnostic trouble code is an indication that the vent valve of the evaporative emissions control system (EVAP) is stuck closed. The EVAP system reduces harmful pollutants, generated by the engine combustion process, from being expelled into the environment.P2422 OBD-II Trouble Code: Evaporative Emissions Control ...
https://www.yourmechanic.com/article/-p2422-obd-ii-trouble-code-evaporative-emissions-control-system-evap-vent-valve-stuck-closed-by-jamahl-walker#:~:text=What%20the%20P2422%20code%20means,being%20expelled%20into%20the%20environment.


P0651 HONDA Code - Sensor Reference Voltage 'B' Circuit ...
https://www.engine-codes.com > p0651_honda'P0651 HONDA code possible causes · Faulty Engine Control Module (ECM) · ECM harness is open or shorted · ECM circuit poor electrical connection · Shorted sensor on ...
https://www.engine-codes.com/p0651_honda.html

P1454 HONDA Code Fuel Tank Pressure Sensor Range ...
https://www.autocodes.com > p1454_hondaOct 9, 2016 - 'P1454 HONDA code possible causes · Faulty Fuel Tank Pressure (FTP) Sensor · Fuel Tank Pressure Sensor harness is open or shorted · Fuel Tank ...
https://www.autocodes.com/p1454_honda.html


The P2127 code means that the throttle or pedal position sensor switch E has a low input. The pedal position sensor is a sensor found on the gas pedal. The sensor tells the ECU when the gas pedal is depressed and how far it is depressed.

P2127 OBD-II Trouble Code: Throttle/Pedal Position Sensor ...

The P2138 trouble code indicates that the Engine Control Module has detected a malfunction within the D and/or E circuits of the throttle position sensor.

P2138 OBD-II Trouble Code: Throttle/Pedal Position Sensor ...

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Switching on the aircon will rob the engine of a handful of horses but most people most of the time won't notice. Could be the problem goes deep.

By 2007 most vehicles were digital computer controlled so it isn't easy to guess what is going on. I think you need a guy with a good scanner who knows how to use it who can gather and interpret live data.

Electronic throttle control !
DTC P2120: Accelerator Pedal Position (APP) Sensor 1 Circuit
DTC P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage
DTC P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage
DTC P2125: Accelerator Pedal Position (APP) Sensor 2 Circuit
DTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage
DTC P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage
DTC P2138: Accelerator Pedal Position (APP) Sensor 1-2 Correlation

2009 Chevy Silverado P2138 Accelerator Pedal Position


Circuit/System Description
The throttle actuator control (TAC) system uses two accelerator pedal position (APP) sensors to monitor the accelerator pedal position. The APP sensors 1 and 2 are located within the pedal assembly. Each sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit.
Two processors are also used to monitor the TAC system data. Both processors are located within the engine control module (ECM). Each signal circuit provides both processors with a signal voltage proportional to pedal movement. The processors share and monitor data to verify that the indicated APP calculation is correct.

DTC P0455: Evaporative Emission (EVAP) System Large Leak

The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP vent solenoid valve CLOSED. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. The following table illustrates the relationship between the ON and OFF states, and the OPEN or CLOSED states of the EVAP canister purge and vent solenoid valves.

check your aps sensor,accelarator position sensor if its bad and make sure all connector and wire from this sensor to ecu is good,.

Throttle/pedal position sensor recieving/sending out of range , i'd change the tps

have the throtthle body cleaned and then decide if you need it replaced may be dirty

P2138 is Throttle Pedal Position Sensor/ Switch D / E Voltage Correlation. Replace the Throttle Pedal Position Sensor/Switch.Remember to have the set code Cleared from the cars computer, this will turn off the check engine light and reset it. Good Luck and have a good XMASS.

the p2127 code is an Accelerator position sensor (low input) as is the p(2138) could be moisture or debris in harness plugs. Try using dielectric grease.