Check engine all the time we replace crankshast sensor and still ligth come on check engine

If you can,go to Autozone,they will test your battery and alternator for free,only takes a few minutes,on your brake light,check brake fluid in master cylinder could be low, setting the sensor off.If your brake fluid runs dry,you will have to bleed,you may have a brake leak and check your brake pad and shoes,may need replacing.

no. in order to take out the crankshaft, you need to remove engine.

check fuel pressure, ignition source , timing,plugs ,dist& rotor ,coil ,sensors , does check engine ligth on or comes on . just turn key on no start see if check engine ligth comes on

P1166 refer to O2 sensor heater circuits malfunction, HO2 Heater system electrical, bank 1.

Your computer relies upon the temp sender to tell it when it should switch from cold to hot mode. If it gets faulty information to begin with, nothing else in the fuel/timing management system will work properly which can cause hard starting, poor fuel mileage and overall poor running.
The results long term of not fixing the problem can range from just having an engine that never runs correctly to one with severe and expensive failures. Replace the sender!!! They are relatively inexpensive and not terribly difficult to replace.

You knowed what code are there? Read the Check Engine Codes

If you change the sensors, Reset the ECU, sometimes they keep stored in the mmeory.

Hope this help; good luck (remember rated this help).

there are four O2 sensors,you need to check the sensor on the drivers side exhaust,the front O2 before the converter

if the engine computer says that you have a slow O2 sensor what it means is that the sensor does not react as quickly as it should and it needs to be replaced. nox is oxides of nitrogen, a product of too lean combustion which causes cylinder temps to go too high. it sounds like replacing O2 sensor will make it happy. engine computer is having a hard time controlling lean/ rich fuel mix because sensor is slow to register changes, needs to have response time in milliseconds or engine computer can't operate properly. O2 sensors do wear out, normal service item. hope that helps

P0330 Knock Sensor 2 Circuit Malfunction (Bank 2)
Check the resistance of the knock sensor (compare it to factory specs)
The knock sensor is faulty and needs to be replaced.
Check for broken/frayed wires leading to the sensor.
There is a wiring short/fault in the knock sensor circuit
Check timing

You have a leak in the fuel system somewhere or a bad evaporative system sensor, the way the system works is the control module for the emission system pulls a vacuum on the gas tank and lines to check for leaks, if it can't get a certain vacuum level for a specified time it decides there is a leak and the check engine light comes on. This may be covered under the Federal Emissions warranty, call the dealer and inquire if the Evap System is covered.