Question about 1997 Chrysler Concorde

1 Answer

What do codes 12 21 55 mean on 1997 chrysler concorde

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Chrysler Master
  • 17,970 Answers

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 cycles.

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.

Hope this helps (remember to rating this answer and leave us a testimonial comment).

Posted on Oct 13, 2011


1 Suggested Answer


6ya staff

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 97 Chrysler concord how do you reset the

reset? do mean stop it once it's activated? simply press the door unlock button on your key fob.

Sep 20, 2014 | 1997 Chrysler Concorde

1 Answer

What does P 0304 Mean

Click here to see,you have a misfire on cylinder number 4.

Jan 15, 2013 | 1997 Chrysler Concorde

1 Answer

What does engine code 306 for a 1996 Concorde mean

have to take to dealer its a security code for the anti theft system i think because all other codes are four digit letter codes on 99 models.

Aug 02, 2012 | Chrysler Cars & Trucks

1 Answer

I have a Chrysler concorde 2000 and the transmission light is on What could it mean

it means your car has the obd2 code problem, you need a scan tool to diagnose the code, and then delete the code, i know this tool is helpful for your car. or you can take it to the chrysler dealer, they will check for you, hope help.

Jul 09, 2011 | 2000 Chrysler Concorde

2 Answers

Do you know what trouble code 21 is for a 97 chrysler concord would be?

throttle position sensor voltage high. shouldnt be very expensive or hard to replace

Feb 01, 2011 | 1997 Chrysler Concorde

1 Answer

1997 Chrysler Concorde LXI. Radio works its just

Try disconnecting the battery for five minutes and then reconnect. This may reset the memory in the radio.

Sep 16, 2010 | 1997 Chrysler Concorde

1 Answer

I got a p0700 code which is trans control system on my wifes 97 Concorde. What does it mean.

this is the TCM (transmission control module) telling the PCM (powertrain control module) to turn on the check engine light due to a fault in the auto trans, the code for the fault is stored in the TCM, to get this cheched you need to have the dealer run a TCM fault code test.

May 13, 2010 | 1997 Chrysler Concorde

1 Answer

1997 Chrysler Concorde Lx problem code from Advanced Auto was P1698 and it said to check with manufacturer. They dont know either, computer does not go back that far. What does this mean?

no message received from the transmission control module. The bus system is the communication system the computers use to send information back and forth. Anything from a bad fuse, bad wire, or a faulty computer can cause that code.

Dec 31, 2009 | 1997 Chrysler Concorde

Not finding what you are looking for?
1997 Chrysler Concorde Logo

302 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chrysler Experts


Level 3 Expert

85222 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Are you a Chrysler Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides