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.

cylinder 5 glow-plug rationality with a source-label caveat

cylinder 6 glow-plug rationality and inconsistent source wording

An incorrect-glow-plug code can be a live resistance-rationality result

Cylinder 8 glow-plug rationality depends on both voltage and current feedback

Cylinder 9 Glow Plug Incorrect

Cylinder 10 Glow Plug Incorrect

Cylinder 11 Glow Plug Incorrect

Cylinder 12 Glow Plug Incorrect

Ignition-control performance can be an internal SPI communication error

the fifth sensor reference is monitored for low supply voltage

Reference E low identifies the VSS2 speed-sensor supply

Reference E high uses the VSS2 rail’s own voltage scale

Reference E uses an internal bandgap check, not the external five-volt limits

Sensor Reference Voltage F Circuit/Open

Sensor Reference Voltage F Circuit Low

Sensor Reference Voltage F Circuit High

Sensor Reference Voltage F Circuit Range/Performance

oil-pressure control open circuit is an electrical monitor

oil-pump control voltage is low in the off state

oil-pump control circuit stays high when driven on

two-stage oil-pump response remains in the high-pressure state

a two-stage oil pump fails to leave its low-pressure state

Ford glow-plug module memory checksum fault

Cylinder 11 Glow Plug Control Circuit Low

Cylinder 11 Glow Plug Control Circuit High

Cylinder 12 Glow Plug Control Circuit Low

Cylinder 12 Glow Plug Control Circuit High

Pacifica wake-up performance and permanent-code clearing

glow-control performance can be judged by calculated ground offset

Sensor Power Supply C Circuit/Open

the auxiliary-pump controller sees its 15-volt sensor supply low

sensor supply C is above the ATPC limit

Compass starter performance and market-specific PCM logic

Ford upstream NOx sensor processor performance fault

Ford downstream NOx sensor processor performance fault

Fuel Injector Control Module Requested MIL Illumination

Engine RPM Output Circuit Low

Engine RPM Output Circuit High

Wrangler restart performance and coordinated PCM/ABS software

Reductant Control Module Internal Temperature Sensor Circuit

Reductant Control Module Internal Temperature Sensor Range/Performance

Reductant Control Module Internal Temperature Sensor Circuit Low

Reductant Control Module Internal Temperature Sensor Circuit High

Stop-Start Mode Lamp Control Circuit

Glow Plug Control Module 2

Glow Plug Control Module 2 Control Circuit/Open

Glow Plug Control Module 2 Control Circuit Low

Glow Plug Control Module 2 Control Circuit High

Glow Plug Control Module 2 System Voltage

Glow Plug Control Module 2 Performance

Glow Plug Control Module 2 Memory Checksum Error

Glow Plug Control Module 2 to PCM Communication Circuit

Glow Plug Control Module 2 to PCM Communication Circuit Range/Performance

Volkswagen CJAA cold-start intake-airflow control performance

Economy Mode Lamp Control Circuit

The transmission request points to a separate diagnostic record

Allison range inhibition and low pump-pressure diagnosis

the Jeep diesel engine module is reporting a transmission fault

brake-message validity in a documented disabled calibration

Clutch switch comparison needs repeated driving events

An invalid range pattern is different from a bad PWM frequency

A plausible selector position can still carry the wrong signal frequency

transmission range low voltage is encoded in PWM behavior

transmission range high voltage requires the right PWM convention

Transmission Range Sensor A Circuit Intermittent

Transmission Fluid Level Sensor Circuit

Transmission Fluid Level Sensor Circuit Range/Performance

Transmission Fluid Level Sensor Circuit Low

Transmission Fluid Level Sensor Circuit High

Transmission Fluid Level Sensor Circuit intermittent/Erratic

Transmission Fluid Level Too Low

Transmission-temperature circuit evidence must be separated from a substituted value

transmission temperature plausibility includes warmup behavior

transmission temperature circuit low means very low inferred resistance

high transmission-temperature circuit input can indicate an open path

Transmission Fluid Temperature Sensor A Circuit Intermittent

Why turbine-speed circuit evidence comes before a road-speed comparison

input-speed performance tracks repeated implausible drops

input speed stays low when operating conditions imply activity

Intermittent turbine-speed circuitry is not the same as noisy speed data