THE CODE DIRECTORY

Diagnostic code references — Page 65.

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

Acura / Honda

P1671

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.

Honda A/T FI data line B: diagnosing a missing signal

Low Engine Oil Level Lamp Control Circuit

Honda A/T FI data failure: why the shared circuit test matters

Engine Hot Lamp Control Circuit

Tachometer Control Circuit

EVAP Vent Solenoid Control Circuit

Driver 4 Line 6

Traction Control System FI Data Line No Signal

the EPC warning-lamp circuit needs its own diagnosis

Driver 4 Line 7

Traction Control System FI Data Line Failure

The EPC warning-lamp circuit is shorted to supply

FPTDR Signal Line Failure

The EPC warning-lamp wire is shorted to ground

The EPC warning-lamp circuit is open

Clutch Released Switch Circuit Open Or Shorted

Metering Oil Pump Failure

Driver 5 Line 1

A/T FI Signal A Low Input

No Instrument Panel Cluster CCD/J1850 Messages Received

unfinished programming needs a software-history check

Driver 5 Line 2

Integra A/T–FI signal A high input

Charging System Voltage Too Low

Metering Oil Pump Failure

Driver 5 Line 3

the Wrangler speed-control power path needs diagnosis

Metering Oil Pump Temperature Sensor Circuit

Driver 5 Line 4

service history can explain the Jeep battery-disconnect code

Metering Oil Pump Position Sensor Circuit

Control Unit Programming Communication Error

Driver 5 Line 5

distinguishing an invalid Jeep key message from a bad key

Metering Oil Pump Stepping Motor Cont Circuit

Driver 5 Line 6

Integra A/T–FI signal B low input

No SKIM Bus Message Received

Metering Oil Pump Stepping Motor Cont Circuit

Control Unit Error Programming

Driver 5 Line 7

Integra A/T–FI signal B high input

No Cluster Bus Message

Metering Oil Pump Stepping Motor Cont Circuit

Internal Fuel Injection Pump Controller Failure

Metering Oil Pump Stepping Motor Cont Circuit

Delivered Torque Circuit Fault

No Communication Between ECM & Injection Pump Module

Oil Pressure Control Solenoid Circuit

Malfunction Indicator Lamp MIL Electrical

ECM Loop Overrun

Ford F-Series wastegate driver detects an electrical fault

Traction Control System STB Line Failure

Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor

Wastegate Solenoid Circuit

MIL Malfunction

Coolant Gage Circuit Low Voltage

Fuel Injection Pump Controller Calibration Failure

Turbo Pressure Control Solenoid Circuit

Coolant Gauge Circuit Low Voltage

MIL Open Circuit

Coolant Gage Circuit High Voltage

Turbo Control Solenoid Circuit

Coolant Gauge Circuit High Voltage

MIL Short To Ground

Tachometer Circuit Low Voltage

DTC Detected In ECM Or PCM

MIL Circuit Malfunction

Turbo Charge Control Circuit

MIL Short To B+

Tachometer Circuit High Voltag

Tachometer Circuit High Voltage

the Jeep transmission controller has lost engine messages

Turbo Charge Relief Circuit

MIL Open Short To Ground

Remote Keyless Entry Circuit Low

No CCD/J1850 Message From BCM

TCM To ECM Torque Reduction Circuit

Remote Keyless Entry Voltage High

Traction Control Fuel Cut Signal Low Input