Question about Dodge Ram
Constant code p0642 car runs fine in heated garage when out in freezing temps starts to run very rich and will eventualy flood right out when scanned p0642 and stuck rich codes for all 4 o2 sensors come upwhat and where is sensor a
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: 1999 dodge dakota p1762 code
dont know lots about this witout engine size but some have 1 coil per cylender possible coil is bad or plug 02 sensor will cause some problems but a miss fire will cause it to run like trash
Posted on Oct 08, 2008
Chrysler has a bulletin out for a simular condititon that involves replacing the pcm. Heres the bulletin number 18-005-04. This is only 1 possible cause , Fuel pressure, coolant temp sensor, thottle position sensor all can cause like problems. Seeing sensor values and fuel adaptives with a scan tool helps pin point problems.
Posted on Mar 08, 2009
If the only code you have is a P0113 then the answer to your question is no it can not be the oxygen sensor. P0113 indicates that the IAT sensor is reading at -46 deg F. With the computer thinking it is that cold it will need lots of fuel,cold air is more dense and com-pack so more molecules of oxygen and therefore needs more fuel to keep correct air/fuel ratio.
Do you have a way to measure voltage across the sensor?
You should have about 5V coming into the sensor and around 1.5 to 3.0V(depending on the temp) leaving it.
Posted on Mar 14, 2009
was the code for rich or lean? may try cleaning mass air flow sensor. it is in the air intake tube and has a flat wire connector. take out of tube and take four torx bolts out and clean with mass air flow cleaner or brake cleaner and put back in when dry. or it could be a bad wire on the o2 harness. look for chaffing or broken wires in harness by o2. also could be the exhaust system has a slight blockage. could also be some other things but try these first.
Posted on May 07, 2009
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