Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
2Original wording in English
NISSAN
NISSAN: MIL ON WITH P0740, P0744, P0840, P1777. THE MIL IS ON WITH ONE OR A COMBINATION OF THE FOLLOWING DTCS STORED IN CONSULT III/ENGINE AND/OR TRANSMISSION. REFER TO THE REPAIR FLOW CHART. *PE
NISSAN
NISSAN: MIL ON W/DTC P0840, P0845, P0744, P1777. REPLACE THE CONTROL VALVE ASSEMBLY WITH PART LISTED; REFERENCE SECTION TM, CONTROL VALVE REMOVAL AND INSPECTION IN APPROPRIATE ESM; ERASE EEP ROM CALIBRATION DATA IN TCM AND ALLOW IT TO RECALIBRATE. ALTIMA, ROGUE, SENTRA. *PE
Check vehicle applicability
9A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Ignition Retard Request Circuit Fault
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.