Car Codes diagnostic trouble code
…*Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): B22A9-42 - ECU Internal Performance-General Memory Failure.** B22A9-16 - ECU Internal Performance - Circuit Voltage Below Threshold. B22A9-17 - ECU Internal Performance - Circuit Voltage Above Threshold. B22A9-19 - ECU Internal Performance - Overcurrent. B22A9-42…
Code interpretation
What B22A9-42 means
This code indicates Vehicle fault code with verified manufacturer evidence Its precise meaning depends on the reporting control module, complete failure-type suffix, model year, powertrain and software level.
Driver experience
Symptoms you may notice
A stored diagnostic trouble code or a related system warning.
Test, do not guess
Possible causes
The precise cause depends on the reporting module, vehicle specification, circuit condition and software level.
Evidence-led checks
Recommended diagnostic route
Save the complete scan and confirm the code against model-specific technical information before testing.
- Capture the evidenceSave the complete all-module scan, code suffixes and freeze-frame data.
- Prove the basicsTest battery condition, system voltage, power and grounds.
- Identify the reporterConfirm the module that logged the code and check circuit integrity.
- Compare live dataReview commanded and actual values under the conditions that set the code.
- Test before replacingUse model-specific wiring diagrams, pin tests and technical information.
- Verify the repairClear the code only after recording evidence, then confirm it does not return.
Vehicle fitment
Vehicle applicability
Jeep Grand Cherokee
Before clearing
Can the code be cleared?
Clearing a code without fixing the cause removes useful evidence and may only switch the warning off temporarily. Save the full scan first; a permanent or repeatedly returning code needs testing.
Confirm the suffix, reporting module, model, year, engine and live data before replacing a component.
Verified public evidence
Manufacturer and model coverage
11 public manufacturer records match this search. These records support applicability research but do not replace VIN-specific workshop information.
GRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
High Voltage (HV) Battery Will not Take a Charge, Diagnostic Trouble Code B22A9-42-ECU Internal Performance-General Memory Failure Integrated Dual Charge (IDCM)
SourceGRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
Charger , Onboard Battery Symptom/Vehicle Issue: High Voltage (HV) Battery Will not Take a Charge, Diagnostic Trouble Code B22A9-42-ECU Internal Performance-General Memory Failure Integrated Dual Charge (IDCM) Customer Complaint /Technician…
SourceGRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
High Voltage (HV) Battery Will not Take a Charge, Diagnostic Trouble Code B22A9-42-ECU Internal Performance-General Memory Failure Integrated Dual Charge (IDCM)
SourceGRAND CHEROKEE 4XE · 2023 · Powertrain
…et one or more of the following Diagnostic Trouble Codes (DTCs): **B22A9-87 - ECU Internal Performance-Missing Message. P0D21-00 - Battery Charger "A" Output Voltage Too Low.** B22A9-42 - ECU Internal…
SourceGRAND CHEROKEE 4XE · 2025 · Powertrain
…et one or more of the following Diagnostic Trouble Codes (DTCs): **B22A9-87 - ECU Internal Performance-Missing Message. P0D21-00 - Battery Charger "A" Output Voltage Too Low.** B22A9-42 - ECU Internal…
SourceGRAND CHEROKEE 4XE · 2025 · Powertrain
…nternal Performance - Circuit Voltage Below Threshold. B22A9-17 - ECU Internal Performance - Circuit Voltage Above Threshold. B22A9-19 - ECU Internal Performance - Overcurrent. B22A9-42 - ECU Internal Performance -…
SourceGRAND CHEROKEE 4XE · 2023 · Multiple/unspecified
…ustomers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): **B22A9-42 - ECU Internal Performance-general…
SourceGRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
…s must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find the following Diagnostic Trouble Code (DTC) has been set: **B22A9-42 - ECU Internal Performance-General…
SourceGRAND CHEROKEE 4XE · 2025 · Multiple/unspecified
…Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): B22A9-42 - ECU Internal Performance-General…
SourceGRAND CHEROKEE 4XE · 2022 · Powertrain
…e of the following Diagnostic Trouble Codes (DTCs) have been set: **B22A9-87 - ECU Internal Performance - Missing Message. P0D21-00 - Battery Charger "A" Output Voltage Too Low B22A9-42 -…
SourceGRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
…*Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): B22A9-42 - ECU Internal Performance-General…
Source