Question about 2000 Chrysler Concorde
Code p1792 and mil code 018 also hex code 21
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Posted on Jan 02, 2017
P1768 MEAN TRANSMISSION RELAY ALWAYS OFF..WAS UNABLE TO FIND P1792..IF PROBLEM STARTED AFTER HEADS WERE DONE..LOOK CLOSELY AT AT ENGINE MAIN WIRING CONNECTORS AND GROUND CONNECTIONS THAT ARE ON ENGINE..LOOK FOR GROUND EYELETS NOT SECURED OR LOOSE..LOOK FOR ANY PINCHED WIRING AS WELL..MAKE SURE NO SPREAD TERMINALS IN CONNECTORS AS WELL..YOU CAN ALSO TRY SWAPPING ANOTHER RELAY IN PLACE OF TRANS CONTROL RELAY..MAKE SURE PART NUMBERS MATCH UP..
TCM(NGC)PIN 16 IS TRS T3 SENSE CIRCUIT..PIN 17 IS NOT USED...HAS TO DO WITH TRANS RANGE SENSOR..I DON'T THINK THIS CAUSING YOUR PROBLEM..
Posted on Aug 04, 2009
DTC 12 - Battery or power line recently disconnected - This code is normal
if the electrical system has been worked on or the battery has recently
been disconnected. It will be removed after 15 ignition switch on/off
DTC 21 - Oxygen Sensor
Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts. Look for melted wire insulation near the exhaust manifold. An open connection will cause this fault code.
Bad oxygen sensor - Replace the sensor which is located on the turbo housing near the down pipe (for turbo) or on the down pipe near the exhaust manifold.
Diagnostic Method - Trigger Parameters
- In closed-loop for 718 seconds (11 minutes, 58 seconds)
- Sensor output stays in the neutral region for more than 21 seconds
Results If Component Fails
A fault code 21 is stored. The circuit stays in closed-loop and the logic module will still monitor the oxygen sensor signal and allow the engine to run rich, but prevent it from running lean.
DTC 55 - No further fault codes are stored.
If this is the only code received, then there are no codes stored in memory. This code will always be given, even if nothing is wrong. If you do not get this code, then you may not be retreiving the codes properly, or the power loss light may be burnt out. The light should come on for 1 second when the ignition is initally turned on as a bulb test.
Really, the main problem that you have there is the O2 sensor, its possible that you need to replace it to solve your problem.
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Posted on Oct 13, 2011
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