My 2007 Suzuki Forenza engin light came on while driving. We check all oil levels and water and was fine. I disconnected the positive treminal on the battery and the light stayed out, just to light up again after 10 miles. I have nit checked the engin codes yet but will do so shortly. Any prelim advice will be appreciated. By the way i do not have a local Suzuki dealer to goto. Help please.

Start by ensuring the tranny fluid level is correct. Is the check engine light on? If so have any codes scanned that may be related to the transmission to point you in the right direction. You can also try disconnecting/reconnecting the battery to see if it will reset the transmission control module and correct your issue.

Suzuki should have stayed with just motorcycles. Anyway, You just had the oil changed. Check and see if they changed the filter also. They may have forgot or were just to lazy. Just a chance the oil filter is bad, I would replace it again(is the oil clean on the dipstick?). Add a higher viscosity oil. At 67,000 miles, you would have to drive dirt roads all the time, with no air filter to get sludge to clog the head ports. Which is slow drain of oil to the pan. The oil pump? well it could be, most likely not. I would say the oil sending unit is bad, but the knocking noise kind of throws that off. Knocking is bad, if it happens again, pull off and shut the engine down. One other thing to watch is the temperature gauge. getting really hot will cause knocking. Check coolant level and the thermostat.

take it to a mechanic but before check that there is water in the radiator.

It's possible that when the engine is at idle RPM it may not produce enough pressure causing the oil pressure sender to activate the light. Does it do this when you just sit and idle the motor? You may also have a oil sender that may need to be replaced.

MINOR TUNE UP CHECK ALL ENGINE FLUIDS, INSPECT AND TEST BATTERY,CHECK COOLING SYSTEM, CHECK ALL UNDER HOOD HOSES,CHECK AND ADJUST THE DRIVE BELTS, CHECK AIR FILTER. CHECK THE PCV VALVE, INSPECT SPARK PLUG WIRES REPLACE SPARK PLUGS. IF YOU DOING A MAJOR TUNE UP. REPLACE THE AIR FILTER, REPLACE THE SPARK PLUG WIRES AND SPARK PLUGS, REPLACE FUEL FILTER,CHANGE OIL FILTER AND OIL,INSPECT ROTATE TIRES, INSPECT DRIVE AXLE BOOTS,IF YOU HAVE MANUAL TRANSMISSION CHECK OIL LEVEL REPLACE MANUAL TRANSMISSION IF YOU OVER 30000 MILES ,CHECK POWER STEERING SYSTEM, CHECK SUSPENSION SYSTEM,CHECK BRAKE DISCS, PADS, DRUMS AND SHOES,CHECK BRAKE HOSES.CHECK TRANSFERCASE OIL LEVEL,CHECK AUTOMATIC TRANSMISSION FLUID HOSE.CHECK THE EXHAUST SYSTEM.

Open up your bonnet and look at the very back of the engine and you should see a long tube with a colored handle sticking out, also the check engine light can also be the engine oil so on either side of the engine you should see the same thing as the transmission handle. Its best to check both the transmission & engine oil/fluid by pull out each one by one when the engine is off and cold then get a rag and wipe off the oil/fluid on the longs metal sticks and putting them back in & out to see how much oil/fluid they have.
On both sticks they have a add more & max level lines so if the oil/fluid is on the add more line, add more oil/fluid to them to get it on the max line.
Remeber that the transmission oil/fluid goes to the back stick behind the motor and the motor oil/fluid goes to the side one. Good luck.

2005 SUZUKI FORENZA 2.0L 4-cyl Engine Code DOHC
Engine Oil capacity with new filter is 4.3 quarts.
Be sure to recheck oil level after engine has run for 5-10 minutes. Do not overfill.
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How do I fix a 2005 Suzuki Forenza Engine Sludge, Oil light, Lifter Knocking Problem?

Take it to a pro.. No user serviceable parts..

first check the cas cap, very common, as for the dipstick im not sure a lot of trans don't have any, if it does it will be red