lexusisgs

code P 0A1A
The MG ECU located in the inverter with converter assembly monitors its internal operation and it will set DTCs when it detects malfunctions.....
usually is related to electrical harness oppen.
if you can replace MG ECU current sensor and IPM
than perform software update if was any recall for J0V recall
check with your mechanic if that will help.

next code P0A78

Common Problems That Trigger the P0A78 Code

• High voltage control module failure
• Inverter/converter assembly failure
• Wiring issue

The Inverter portion of the Inverter/Converter Assembly converts the direct current (DC) voltage from the battery to a three phase alternating current (AC) to drive the hybrid motor and transaxle assembly. If the High Voltage control module detects an issue with the inverter assembly, it will set code P0A78.
Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

another code you r asking
P0000
P0000– No DTCs Detected! – This is a rare code to see due to the fact it’s not a valid diagnostic trouble code, so not many code reading devices display this code.To restore proper operation, you need to hook up an OBDII scan tool and retrieve the DTCs (diagnostic trouble codes) stored in ECU memory. There are 10,000 DTC P-codes an ECU can save in its system memory, so having a specific DTC to point you in the right direction takes much of the guesswork out of diagnosing your vehicle’s problems

For these reasons, having your ECU code a P0000 is confusing because it seems to make no sense. Defined as “No Diagnostic Trouble Codes Reported,” DTC P0000 isn’t a code that should display on your OBDII scan tool.

Moreover, if there are no drivability problems and no MIL, hooking up a scan tool usually just comes up blank. Here’s the catch: there are two cases when DTC P0000 may show up, even if you have no drivability problems or an illuminated MIL.

Good news! If you read this trouble code and there are no other symptoms of car trouble, you are good to go ahead and continue driving the vehicle. No worries.

It’s probably a good idea to clear the code and check again later to see if it recurs. If it keeps popping up, you may want to use a more advanced scan tool to verify it’s not an issue with your scanner.

I am not mechanic but I own some of the lexus models is.gs.rx hybrid.es .allof them are hybrids and very strong .
voltage control module is mounted on some models on hybrid battery and relay 2 of them can get issues impossible to buy relay by piece the whole assembly unit only is available to buy about 200 us dollars.

ps
always check for any recalls on your vehicle if any outstanding before you start paying from your pocket.

bottom line ;my wife like lexus ...so thet is why we have peace in the house......lol
note 2019 es 300h still kicking *** of tesla 3 ;model by far............

lexusisgs

sorry i forgot one more code you were aging for
P0A1B

The Power Management Control control module runs constant self-checks on the hybrid system's inverter/converter assembly. If a problem is detected in this assembly, the engine control module (PCM) will set code P0A1B.Description:The monitor will run whenever the following DTC is not present: TMC's intellectual property Other conditions belong to TMC's intellectual property: -Cause:

• Wire harness or connector
• Inverter with converter assembly
• Hybrid vehicle transaxle assembly

possible you will need subcode to extract to get more details.DESCRIPTION

The MG ECU, which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if the system is malfunctioning. If any of the following DTCs are output, replace the inverter with converter assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A1B-198

Drive Motor "A" Control Module

MG ECU internal malfunction:

R/D converter NM stop error

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on
Related Data ListDTC No.

Data List

P0A1B-198

-

MONITOR DESCRIPTION

The MG ECU (in the inverter with converter assembly) performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the MG ECU checks for an R/D (Resolver/Digital converter) malfunction involving the motor resolver. If the MG ECU detects an R/D converter error, it will conclude that there is an internal malfunction involving the motor resolver and the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0A1B (INF 198): R/D converter NM signal stop abnormality

Required sensors/components

Inverter with converter assembly (MG ECU)

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Hybrid vehicle control ECU

DTC P0A1B (INF 198) is not detected

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off and wait for 30 seconds or more.
5. Turn the power switch on (READY).
6. Drive the vehicle at 5 km/h (3 mph) or more for 30 seconds or more. [A]
7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [B]
8. Read the current DTCs.HINT:
   
   • If a current DTC is output, the system is malfunctioning.
   • If current DTCs are not output, check for permanent DTCs.
9. Check that the permanent DTCs are cleared.
10. If the permanent DTCs are not cleared, perform the universal trip, and then check
11. for permanent DTCs again.

CAUTION / NOTICE / HINT

HINT:

If DTC P0A1B-198 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.

1. Turn the power switch on (READY).
2. Drive the vehicle at 5 km/h (3 mph) or more for 30 seconds or more.

AD NEXT:

Drive Motor "A" Control Module (P0A1B-503)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that an overvoltage in the inverter has occurred. The cause of this malfunction may be one of the following: Internal inverter malfunction In

Drive Motor "A" Control Module (P0A1B-505,P0A1B-806)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that a large current flowed in the inverter for the motor. The cause of this malfunction may be one of the following: Internal inverter malfunc

Drive Motor "A" Control Module (P0A1B-547,P0A1C-124)

DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that an overvoltage in the inverter has occurred. The cause of this malfunction may be one of the following: Internal inverter malfunction In

there is a lot of reading to do ......i hope this will hlp you too.