OK.. so i have a 99 Q45 t it has 173,000k on the clock. First let me start by whats been done to it.oil changenew spark plugsnew map sensornew brakesmotor vac/flush
ok so the issue is my check engine keeps bringing up the code P1105, which is a map/baro solenoid code.as mentioned above i changed the map sensor and it came back 5 minutes later. my fuel consumption sucks and my power band doesn't feel right. please help!!!!
99 Q45t Diagnotic code help!!
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Q45tech
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- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Re: 99 Q45t Diagnotic code help!! (djguilty)
Important to look up each code in FSM AND FOLLOW THE TEST PROCEEDURE EXACTLY:Why did you change SENSOR when SOLENOID is probably defective pr a hose?
Factory Service Manual has a procedure for checking the MAP/BARO solenoid valve when P1105 is tripped. It is rather complex, and you will need a volt meter, but...
Following for a Sentra so you will have to look in your own FSM for differences!1- Warm up the car and pull the vacuum hose connected to the MAP/BARO switch solenoid with the engine idling. There should be vacuum there (~ -20in Hg). If NG, replace the hose. 2- Check the vacuum hose between the Absolute Pressure Sensor and the solenoid for splits/cracks and clogging (blow through it). 3- With the engine off, disconnect the solenoid electrical connector. Turn the ignition switch on. Check the voltage between terminal 2 (brown wire) and ground. It should be 12v (battery voltage). If no voltage, check the 10a fuse #21. 4- Check Absolute Pressure Sensor. Remove the sensor with its wiring connected. (Located near the top of the firewall next to the cruise control actuator [disk-shaped on a bracket]). Remove the hose and turn the ignition on. Voltage between terminal #2 (white wire) and ground should be 3.2-4.8v. Apply a vacuum to the hose and the voltage should be 1-1.4v lower than the first reading. If NG, the sensor is bad. 5- Check the solenoid. Remove the solenoid electrical connector and hoses and check the air passage continuity by applying 12v to the connections. With 12v on, there should be continuity between the two close hose connections, and no connection between the lone connector and the double connection closest to it. With no voltage applied it should be the opposite (no continuity between the close ones, and continuity between the far one and the closest double one). If NG the solenoid is bad. "
Factory Service Manual has a procedure for checking the MAP/BARO solenoid valve when P1105 is tripped. It is rather complex, and you will need a volt meter, but...
Following for a Sentra so you will have to look in your own FSM for differences!1- Warm up the car and pull the vacuum hose connected to the MAP/BARO switch solenoid with the engine idling. There should be vacuum there (~ -20in Hg). If NG, replace the hose. 2- Check the vacuum hose between the Absolute Pressure Sensor and the solenoid for splits/cracks and clogging (blow through it). 3- With the engine off, disconnect the solenoid electrical connector. Turn the ignition switch on. Check the voltage between terminal 2 (brown wire) and ground. It should be 12v (battery voltage). If no voltage, check the 10a fuse #21. 4- Check Absolute Pressure Sensor. Remove the sensor with its wiring connected. (Located near the top of the firewall next to the cruise control actuator [disk-shaped on a bracket]). Remove the hose and turn the ignition on. Voltage between terminal #2 (white wire) and ground should be 3.2-4.8v. Apply a vacuum to the hose and the voltage should be 1-1.4v lower than the first reading. If NG, the sensor is bad. 5- Check the solenoid. Remove the solenoid electrical connector and hoses and check the air passage continuity by applying 12v to the connections. With 12v on, there should be continuity between the two close hose connections, and no connection between the lone connector and the double connection closest to it. With no voltage applied it should be the opposite (no continuity between the close ones, and continuity between the far one and the closest double one). If NG the solenoid is bad. "