THE CODE DIRECTORY

Diagnostic code references — Page 36.

Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.

Generic OBD-II

P0B98

These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.

block 19 high sensing requires an eligible filtered event

Hybrid/EV Battery Voltage Sense S Circuit Intermittent/Erratic

Sense T and groups of zero battery readings

the final block rationality rule has no extra neighboring channel

block 20 low sensing does not require another block

block 20 high is distinct from total-pack overvoltage

Hybrid/EV Battery Voltage Sense T Circuit Intermittent/Erratic

Sense U open-line evidence is separate from range faults

Block 21 must agree with the pack comparison

Block 21 low logic also observes its neighbor

Block 21 high voltage is a qualified sensor report

Hybrid/EV Battery Voltage Sense U Circuit Intermittent/Erratic

Sense V and the limits of an open-circuit conclusion

Block 22 rationality depends on valid pack sensing

Block 22 low logic includes the adjacent block

Block 22 high reporting needs a sustained record

Hybrid/EV Battery Voltage Sense V Circuit Intermittent/Erratic

Sense W open-line checks depend on surrounding values

Sense W must move with the other cell readings

Sense W low is qualified separately from an open line

Sense W high requires valid measuring communication

Hybrid/EV Battery Voltage Sense W Circuit Intermittent/Erratic

Sense X open-line diagnosis uses relationships

Sense X performance follows voltage movement

Sense X low needs both timing and valid prerequisites

Sense X high is a timed upper-limit report

Hybrid/EV Battery Voltage Sense X Circuit Intermittent/Erratic

Sense Y requires an open-line pattern assessment

Sense Y performance is about direction of change

Sense Y low should not be read as a capacity measurement

Sense Y high and the meaning of a qualified event

Hybrid/EV Battery Voltage Sense Y Circuit Intermittent/Erratic

Sense Z open-line evidence includes common power paths

Sense Z must follow a changing voltage reference

Sense Z low is distinct from the open-sensing diagnosis

Sense Z high needs a valid two-second observation

Hybrid/EV Battery Voltage Sense Z Circuit Intermittent/Erratic

neighboring battery-block deviation is measured under load conditions

Jeep 4xe battery-voltage variation and the XU1 repair case

Hybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit/Open

Hybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit Low

fan feedback remains high when the battery fan is commanded off

Hybrid/EV Battery Temperature Sensor E Circuit

Sensor E is compared with other battery temperatures

Sensor E circuit low can correspond to a hot reported value

Sensor E circuit high can look extremely cold

Battery temperature sensor E fails a stability check

Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit/Open

Battery fan feedback is checked both running and stopped

Battery fan speed-feedback frequency is too low

Battery fan feedback frequency exceeds range

Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Intermittent/Erratic

Generator Inverter Temperature Sensor A Circuit

ISG temperature-sensor faults summarized by the PCM

ISG U-phase temperature-sensor low input

Mazda ISG U-phase temperature-sensor input is high

Generator Inverter Temperature Sensor A Circuit Intermittent/Erratic

Drive Motor Inverter Temperature Sensor C Circuit

inverter A sensor 2 plausibility is a cold-soak comparison

a low inverter-temperature signal can appear as extreme heat

sensor C high voltage corresponds to an implausibly cold report

Drive Motor Inverter Temperature Sensor C Circuit Intermittent/Erratic

Drive Motor Inverter Temperature Sensor D Circuit

inverter B sensor 2 is checked against its temperature average

inverter B sensor 2 low voltage is reported as extreme temperature

inverter B sensor 2 high voltage uses a startup warm-up condition

Drive Motor Inverter Temperature Sensor D Circuit Intermittent/Erratic

Drive Motor Inverter Temperature Sensor E Circuit

sensor E performance is an inverter A cold-soak comparison

sensor E low voltage produces a hot-looking calculated value

sensor E high voltage is an implausibly cold sensing condition

Drive Motor Inverter Temperature Sensor E Circuit Intermittent/Erratic

Drive Motor Inverter Temperature Sensor F Circuit

inverter B sensor 3 plausibility is checked after a long shutdown

inverter B sensor F low voltage should not be mistaken for proven heat

sensor F high voltage corresponds to a very cold reported value

Drive Motor Inverter Temperature Sensor F Circuit Intermittent/Erratic

Drive Motor A Phase U Current Sensor Circuit

motor A phase U performance checks current-sensor offset

motor A phase U low is checked with PWM output disabled