Anyone ever have a Bap sensor go bad on them? What symptoms did you have that lead you to the bap?
And are the 2.3 bap sensors the same as the 5.0s?
And are the 2.3 bap sensors the same as the 5.0s?
Dbeck002 said:The BAP sensor
AKA B1tch Ass Police sensor is located right above the dash near the rear view mirror, its usually plugged into the cigarette lighter outlet...
jrichker said:BAP sensors that outright fail will post code 22
Code 22 MAP (vacuum) or BARO signal out of range. The MAP or BARO sensor is pretty much the same sensor for both Mass Air & Speed Density cars. The main difference is where it is connected. Mass Air cars vent it to the atmosphere, while Speed Density cars connect it to the intake manifold vacuum. Its purpose is to help set a baseline for the air/fuel mixture and changes in barometric pressure. The MAP or BAP sensor puts out a 5 volt square wave that changes frequency with variations in atmospheric pressure. The base is 154 HZ at 29.92" of mercury - dry sunny day at sea level, about 68-72 degrees. You need an oscilloscope or frequency meter to measure it.
Baro or MAP test using frequency meter - run the test key on engine off. The noise from the ignition system will likely upset the frequency meter. I used a 10 x oscilloscope probe connected from the frequency meter to the MAP/BAP to reduce the jitter in the meter's readout.
If it is defective, your air/fuel ratio will be off and the car’s performance & emissions will suffer
The code 22 means the computer isn't recieving a signal from the MAP/BARO sensor. That can mean bad wiring (no +5 volts on the orange sensor power wire) or a broken wire between the sensor and the computer. It can also mean that MAP/BARO sensor itself has failed.87stangdiddle said:Jrichker, if i have a code 22 does it mean its bad for sure and I have to get a replacement? I dont have a frequency meter but could i test it as a MAP sensor by reading the output voltage at different vacuums? It looks like im going to have to find a replacement. I can unplug it and everything is the excat same.
jrichker said:The code 22 means the computer isn't recieving a signal from the MAP/BARO sensor. That can mean bad wiring (no +5 volts on the orange sensor power wire) or a broken wire between the sensor and the computer. It can also mean that MAP/BARO sensor itself has failed.
The MAP and BARO sensors are the same type of sensor. Both produce a 5 volt peak to peak square wave that varies in frequency with the vacuum/pressure applied to the port. The voltage output remains constant at 5 volts, +/- 0.25 volt as the waveform changes frequency. The only way to check the sensor output is with either a frequency counter or oscilloscope.
There is no way you can properly check the MAP/BARO sensor without a frequency counter or oscilloscope. Using a voltmeter just gives you and average value of the voltage output. You could have 2.82 volts DC with no square wave output. Or you might have a square wave output and not enough voltage to trigger the computer's input threshold level. A true RMS voltmeter won't even work correctly with a square wave, since most of them are design to measure sine waves.87stangdiddle said:I have a good 5volt reference signal going to the Bap sensor and I have a good ground also. I checked the voltage at the signal wire (green wire i think) at an idle (I didnt no better about needing a frequency meter), and at idle i got 2.69 volts and i revved it up a little and it went up to 2.89 volts. Does this mean anything bad? Just before my car was running very lean mostly at idle and it was surging like it had a cam with .800in of lift or something. There was alot less power and it just was slow in throttle response, so i pulled the codes...heres what i got...Hard Codes
32-Evp voltage low(SONIC)/EPT circuit voltage low(PFE)
82-Air diverter solenoid circuit fault or supercharger bypass valve
95-Fuel Pump secondary circuit fault (Should be b/c i havent put in a fp monitor signal since i did my mass air swap)
Continous Memory
22-MAP/BARO sensor out of range
29-Insufficient input from the VSS(havent hooked in signal from mass air swap)
32-EVP voltage low
66-MAF below minimum voltage or at fault
95-FP secondary circuit fault (no fp signal from mass air swap)
after i pulled the codes i disconnected the battery for 15 minutes and reconnected it and now it runs like a new car, no surging, not running lean, awesome throttle response, tons of power etc. Whats going on here? whats causing it to run like crap then after i reconnect the battery it runs amazing.