The check engine light is on and @ 4000 rpm thier is a severe hesitation. the oil level is correct and the is regularly maintianed what should i do ? please dont say go to dealer

Check the oil level on the dip stick and make it correct. This engine should have a low oil shut down feature. Possible oil pump failure. With oil at correct level, restart engine. If the oil light does not go out with engine running, shut down immediately. Severe Internal rotating component bearing damage has already occurred. look for loose oil filter or hole in oil pan.

It's a safety issue. The computer is trying to save your engine and transmission. If there isn't a light, there still could be a code. It would be in history codes. It takes a scanner to retrieve them. Unless your a race car driver or doing 200 MPH all the time. The RPM's shouldn't stay at 4000 RPM's.

check oil pressure switch located on side of engine block. not sure what side on a neon.

This is an error code related to VTEC related Honda engines. I am sending you a little reading on that error code.. Best of Luck..


The Check Engine Light (CEL) is on. Trouble code P1259. Tests/Procedures: 1. Locate the Variable Timing/Lift Control (VTEC) pressure switch, on the back of the cylinder block, by the oil filter.

2. The VTEC oil switch is normally closed and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire.

3. At approximately 4000 RPM, and when driving the vehicle, the VTEC system should turn on. To turn the system on, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the ECM can verify that VTEC did turn on correctly.

4. The code will set below 4000 RPM if the reference voltage is not grounded. The code will set above 4000 RPM if the VTEC oil switch does not open.

5. If the code sets at 4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly. Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid
Tech Tips: When the P1259 code sets at 4,000 RPM or higher, always verify that the engine oil level is full. Also, if there is an oil pressure or volume problem, always verify that the oil pan is not pushed up and is too close to the oil pickup tube, causing an oil volume problem. Be very careful when supporting the engine with the oil pan.

THAT MEANS ENGINE IS NOT GETTING (FLOW) SUFFICIENT/ REQUIRED OIL AT THE HIGHER RPM. WHEN REQUIRED LUBRICATION NOT TAKES PLACE THE METAL PARTS CREATE MORE HEAT DUE TO FRICTION. THIS WILL LEADS TO OVER HEATING OF ENGINE AND ENGINE GET SEZED.
HENCE PL DONT RUN THE ENGINE AT HIGHER RPM AND DO THE REPAIR IMMEDIATLY.

SOLUTION:.

THE CASES MAY BE,
1.LOW LEVEL OF ENGINE OIL AT ENGINE. PL CHECK THE OIL LEVEL BY CHECKING THE OIL DIP.
IF SO POUR SOME OIL AND CHECK.
2. IMPROPER QUALITY OF THE OIL, WHICH NOT WITH STANDING AT HIGHER RPM.
3. LOWER VISCOSITY (THICHNESS) OF THE OIL MIGHT HAVE USED, INSTEAD OF RECOMMENDED ONE. IF SO OIL IS THE PROBLEM REPLACE RECOMENDED OIL IMMEDIATLY.
4.LOOK IN TO THE OIL PUMP PRESURE ETC., OR CHOKE IN ENGINE OIL FEEDER LINES.

iF NOTHING ABOVE ONE PROBLEM OF ENGINE SHOULD BE MONITOR BY COMPUTER WITH SERVICE STATION.

TAKECARE,
RGDS, JANA

:sewing machine" sounds are usually caused by low oil. It may be that you are using too light a viscosity oil. Try using a heavier oil. The white smoke is troublesome. This is usually cause by burning coolant! If in fact the smoke is blue you are burning oil,and this makes more sense. The valvce stem seals may be worn out. These squeegy oil from the valce stems to keep it out of the cylinder head. If they are worn the oil is allowed to enter the cylinder head and is burned, causing the oil level to drop, and results in the "ticking" noises. It also uses more gas becasue oil doesn't burn at the tempterature that gas does and slows the cumbustion rate requiring more gas to maintian RPM's.Hope this helps.

the oil level may be good and quality may be good, but the oil pump may be going out considering the valve/engine noises. Have it checked quickly, before this engine locks up.

Your catylatic converter may be clogged if your loosing power or top speed is less than it was. You can check this when its running with a battery operated infared heat gauge. the temperature of the muffler should be around the same temp. as the catylatic converter.

P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid

if the engine light is flashing it means that i could be a misfire or a emission problem and its big enough to damage your catalytic converter.