Cheek eng, light is on and it is giving a code po134 but the car is run good.

Cheek brake fluid level. cheek oil .cheek Cadillac sensor might need cleaning.

faulty 02 sensor front bank
https://www.obd-codes.com/p0134

if it is P225
its a fuel trim code ...should go away after you fix the 02 sensor

p0225 is the pedal switch sensor

You should know that a flashing check engine light means that if you drive it, you could cause damage to the engine. To see what the issue is, go to a big auto parts store and get an OBD reader to check the engine computer and see what error codes are present.

Do the injectors have power? The red wire on most is hot, the computer controls the ground.

All that & you didn't say why it failed
What exhaust gas failed & what are the
limits & what did you have

Trouble Code: P0134

HO2S-11 (Bank 1 Sensor 1) Insufficient Activity

Possible Causes:


HO2S heater is damaged or has failedHO2S signal or ground circuit has a high resistance conditionHO2S signal circuit is open or shorted to system power (B+)HO2S has failed (i.e., it is silicon, water or fuel contaminated)PCM has failed.Sounds like you need a new oxygen sensor,Bank 1 Sensor 1 is located on the exhaust manifold, closest to the front.Here's a link to the firing order,bank one is cylinder one side.Here's the part you need,here's how to replace.

could be a mass air flow sensor problem or a crank sensor but its difficult to say as if and when the engine light comes on and you could read the codes as this vehicle is too old to have a OBDII connection then i would be inclined to suspect the computer or ECU but the only way to find out is to back the vehicle to a dealer who has the software to check it out and i do feel the cost of repair is greater than the value of a 94 car which is 18yrs old at the end of the day .

you need to change the oxygen sensor. it will soon cause you problems. after you need to take it in to  erase the code.

Take your vehicle to a parts store and have them run a diagnostic on it. It will tell you what code came up and that will give you a good start.

try checking for a vacume leak it will mimc o2 sensor issues