Car Codes diagnostic trouble code
…0 - Battery Charger "A" Output Voltage Too Low.** B22A9-42 - ECU Internal Performance-General Memory Failure. B22A9-64 - ECU Internal Performance - Signal Plausibility 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. Customers may also comment on the following: The vehicle will not charge…
Code interpretation
What B22A9-16 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 Wrangler, 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
28 public manufacturer records match this search. These records support applicability research but do not replace VIN-specific workshop information.
GRAND CHEROKEE · 2023 · Multiple/unspecified
…estigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU…
SourceGRAND CHEROKEE · 2022 · Multiple/unspecified
…estigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU…
SourceGRAND CHEROKEE · 2023 · Multiple/unspecified
…vestigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ?B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU Internal…
SourceGRAND CHEROKEE · 2022 · Multiple/unspecified
…estigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU…
SourceGRAND CHEROKEE · 2022 · Multiple/unspecified
…estigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU…
SourceGRAND CHEROKEE · 2023 · Multiple/unspecified
…estigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU…
SourceGRAND CHEROKEE · 2023 · Multiple/unspecified
…estigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU…
SourceGRAND CHEROKEE L · 2023 · Multiple/unspecified
…L) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):** B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. B22A9-16 - ECU Internal Performance-Circuit Voltage…
SourceGRAND CHEROKEE · 2023 · Multiple/unspecified
…L) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):** B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. B22A9-16 - ECU Internal Performance-Circuit Voltage…
SourceGRAND CHEROKEE 4XE · 2023 · Multiple/unspecified
…L) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):** B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. B22A9-16 - ECU Internal Performance-Circuit Voltage…
SourceGRAND CHEROKEE 4XE · 2023 · Powertrain
…s): **B22A9-87 - ECU Internal Performance-Missing Message. P0D21-00 - Battery Charger "A" Output Voltage Too Low.** B22A9-42 - ECU Internal Performance-general Memory Failure. B22A9-16 - ECU Internal Performance-Circuit Voltage Below…
SourceGRAND CHEROKEE 4XE · 2025 · Powertrain
…0 - Battery Charger "A" Output Voltage Too Low.** B22A9-42 - ECU Internal Performance-General Memory Failure. B22A9-64 - ECU Internal Performance - Signal Plausibility Failure. B22A9-16 - ECU Internal Performance…
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.** B22A9-16 - ECU Internal…
SourceGRAND CHEROKEE · 2023 · Multiple/unspecified
…Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU Internal Performance-Circuit…
SourceGRAND CHEROKEE 4XE · 2022 · Multiple/unspecified
…Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) have been set: ? B22A9-64 - ECU Internal Performance-Signal Plausibility Failure. ? B22A9-16 - ECU Internal Performance-Circuit…
SourceGRAND CHEROKEE 4XE · 2023 · Multiple/unspecified
…umination 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…
SourceGRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
…g Diagnostic Trouble Code (DTC) has been set: **B22A9-42 - ECU Internal Performance-General Memory Failure.** B22A9-64 - ECU Internal Performance - Signal Plausibility Failure. B22A9-16 - ECU Internal Performance -…
SourceGRAND CHEROKEE 4XE · 2025 · Multiple/unspecified
…of the following Diagnostic Trouble Codes (DTCs): B22A9-42 - ECU Internal Performance-General Memory Failure. B22A9-64 - ECU Internal Performance - Signal Plausibility Failure. B22A9-16 - ECU Internal Performance - Circuit…
SourceGRAND CHEROKEE 4XE · 2022 · Powertrain
…t: **B22A9-87 - ECU Internal Performance - Missing Message. P0D21-00 - Battery Charger "A" Output Voltage Too Low B22A9-42 - ECU Internal Performance-general Memory Failure.** B22A9-16 - ECU Internal Performance…
SourceGRAND CHEROKEE 4XE · 2024 · Multiple/unspecified
…llumination 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 -…
Source