P1319

What it means

On Honda, P1319 means the engine control unit has detected a fault in the reset circuit between itself and the spark plug voltage detection module for the rear bank of cylinders. This module is part of the ignition-based misfire monitoring on certain V-engine models. The control unit sets the code when the reset signal to the module is missing, stuck or does not match what it expects.

Symptoms

• Check engine light on
• Possible rough running or hesitation, though many cars feel normal
• Misfire-related codes stored alongside P1319
• Failed emissions or readiness monitor not completing
• Occasional poor fuel economy

Possible causes

• Damaged, chafed or corroded wiring in the reset circuit between the control unit and the rear bank detection modulelikely
• Loose, corroded or water-damaged connector at the detection module or control unitlikely
• Faulty spark plug voltage detection module for the rear bankpossible
• Poor power or earth supply to the modulepossible
• Ignition coil or coil pack fault affecting the rear bank and upsetting the module signalpossible
• Internal fault in the engine control unit reset outputrare

How to diagnose

1. Read all stored codes and freeze frame data, noting any misfire or ignition codes and the conditions when P1319 set
2. Check for technical service bulletins and calibration updates for the specific model and engine, as the layout varies
3. Visually inspect the rear bank ignition wiring, the module and its connectors for damage, oil contamination, corrosion, water ingress or rubbing
4. Disconnect and inspect the connector pins for tightness and green or white corrosion, then reseat them firmly
5. Using the wiring diagram for the model, test the module's power supply, earth and reset wire for continuity, short to earth and short to supply
6. Check the rear bank spark plugs, coils and plug leads for wear or faults that could affect the module
7. Clear the code and road test while monitoring live data to see if it returns
8. If the wiring and supplies are good, test or substitute the module and then consider the control unit, following the manufacturer procedure

How to fix

• Repair or replace damaged wiring in the reset circuit
• Clean, repair or replace corroded or loose connectors and make sure they are fully seated
• Replace the rear bank spark plug voltage detection module if it fails testing
• Restore a good power supply or earth to the module
• Replace faulty ignition coils or spark plugs on the rear bank
• Update or repair the control unit only if testing confirms it as the cause or an applicable calibration update exists

Can I keep driving?

This code for other makes

• P1319AcuraSpark Plug Voltage Detection Module Reset Circuit Malfunction Rear Bank
• P1319InfinitiSpark Plug Voltage Detection Module Reset Circuit Malfunction Rear Bank
• P1319MazdaInjection Timing Piston Position Sensor Circuit Range Performance
• P1319VolkswagenKnock Sensor 1 Circuit Short To Ground

Nearby codes

• P1318HondaSpark Plug Voltage Detection Module Reset Circuit Malfunction Front Bank
• P1324HondaKnock Sensor Power Source Circuit Low Voltage