Codes p1259 and p1486, shut off while driving and will not start

2000 HONDA ACCORD

130,000 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC

VEGASCHICK702

MEMBER
12 POSTS

My car stalled after driving for about 10-15 minutes later than won't start back up until next day. I have put new plugs, wires, thermostat, ignition module, and fuel pump. I checked all the relays and fuses, and everything is good there. It does have two codes, one is p1259 and the other one is p1486.

Jun 5, 2022 at 6:33 AM

SQM

✓Experienced Mechanic
6,383 POSTS

Hello,

The codes
P1259 A problem in the VTEC Oil Pressure Switch circuit or VTEC Solenoid Valve circuit.

P1486 Cooling System Malfunction.

From what you are describing it could be due to a faulty coolant temperature sensor. It is possible that the sensor is defective and sending a signal to the ECM that the engine is too hot and that is triggering the engine shut off. As it cools down it allows you to start the engine.

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

I have attached the diagram as well as the diagnostics for the codes below.

Let me know of any questions.
Thank you.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jun 5, 2022 at 9:21 AM