Question about Lexus Cars & Trucks
Check engine light on, check with OBD code came out engine coolant temp sensor and fuel air metering sensor or MAF, change both including thermostat and clean front 02 sensor after that i cleared it from my OBD and it's all gone then after i drove it for 20 minutes same light came on again, cleared it again after a night following morning goes to work 20 minutes after same light came on again and engine idle is normal 8 on rpm. any help, advise, or suggestion???? THANKs !!!!!
This also happened to me and it was the heater matrix, whatever that is
Posted on Mar 17, 2014
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Posted on Jan 02, 2017
SOURCE: FUEL AIR METERING
thats a code for an air fuel metering 02 sensor "a/f sensor" make sure you got the right one in u might have got just an 02 sensor instead of an "a/f sensor" hope this helps also is it a dx ex 6 cyl 4cyl?
Posted on Sep 17, 2008
P0115 - Engine Coolant Temp Sensr - open/short
P1159 - Variable Intake Motor Malfunction
P1191/P1193 Limp Home Valve - Low RPM
First, clean the throttle body and check for anything which might obstruct AIR FLOW to it.
The P1159 is the Variable Intake Motor Malfunction. this motor is either 'OPEN'... or 'CLOSED' position. It is located on/in the intake manifold (plenum) and is only opened when cruising... it is closed at idle. If it sticks 'OPEN' is can cause drivability issues.
Posted on Oct 19, 2009
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May 18, 2015 | 2000 Mercury Mountaineer
Inspect vacuum hoses for splits, kinks, and proper connections, as shown on Vehicle Emission Control Information label. Inspect thoroughly for any type of leak or restriction.
Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking, especially between the mass air flow (MAF) sensor and the throttle body.
Inspect for air leaks at throttle body mounting area, mass air flow (MAF) sensor and intake manifold sealing surfaces.
Inspect the wiring harness for poor connections, pinches, cuts, or other damage.
Inspect for loose, damaged, or missing sensors and/or components.
Really need to check sensor PID'S with a scan tool, An maybe a scope too ! PID'S are parameter identification . All the sensors operate within a set voltage parameter , like the coolant temp. sensor an if it's off it can affect fuel delivery !
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