2001 Honda Civic 1.7 L VTEC Engine. The VTEC does not work

yes it should fit as 1.4 & 1.6 uses the same engine block.

P1259 HONDA - VTEC System Malfunction
Possible causes- Low engine oil pressure or level
- Open or short circuit condition
- Faulty VTEC oil pressure switch
- Faulty VTEC solenoid
When is the code detected?The P1259 is set when there is a problem in the VTEC Oil Pressure Switch circuit or VTEC Solenoid Valve circuit

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.

TELL ME WHAT CHECK ENGINE LIGHT CODE YOU ARE GETTING.CODE SCAN AND TELL ME WHAT CODE YOU ARE GETTING.MOST VTECH ENGINE HAS PROBLEM WITH VTEC SOLENOID OR VTEC OIL PRESSURE SWITCH.MOST TIME CHECK THE OIL PRESSURE BY REMOVING VTEC OIL PRESSURE SWITCH FROM THE LOCK UP SOLENOID AND CONNECT AN ADAPTER BETWEEN THE SWITCH AND THE SOLENOID. BUT I CANT SAY ITS YOUR VTEC SYSTEM UNTIL YOU CODE SCAN CAR.OIL PRESSURE SHOULD BE 50 PSI @ 3000 RPM OR 85 PSI @3000 RPM.

For the 1998 Honda Civic 1.6L SOHC -In-Line 4-Cylinder:
For all: LX, DX, EX, GX and HX Models; VTEC and VTEC-E

Firing Order:
1-3-4-2

Cylinders:
...........(back)..........
|...4.....3....2....1...|
...........(front)

Distributor:
....(back)
..........1
2
........o
.................3
.....4
.....(front)
Rotation: Clockwise
Let me know if this helped, or if you have addtional questions. Feel Free to contact me at FixYa.com!

stock engine for that car is a 1.4 in line 4 cylinder with efi.

code 1259 is the actual v-tech code and oil pressure codes go from po520-po523. Many people do not have any idea what v-tech actually means. It's an actual oil solenoid valve that opens up above 4000 rpms and adds extra oiling to the cylinder head. To set this code po1259 you would have had your car above 4000 rpms for more than 3 seconds i believe and have this valve not work. Chances are that the valve it's self in the head is bad and setting this code. I have had it happen on a few other Honda's

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

What the previous owner told you could be correct(that is 33mpg), B16A1 Vtec engine were made for power and fuel efficiency. Your clutch upgrade would not affect your fuel consumption unless you feel anything slipping during acceleration. I say you give your engine a good tune up and compare the milage again.

hi you will know if it works it don,t kick in till the engine reachs a certain rev range usually around 3000 rpm then it transferes to the hi lift cam and when it kicks in will feel like a turbos been fitted. if not you have a problem with it which would likley be a problem with its solenoid or oil pressure. yates210456