Engine Controls - MIL ON/DTC's P2195/P2197 Stored
05-010October 22, 2011
Applies To:
2005 RL - From VIN JH4KB1...5C000001 thru JH4KB1...5C021598
MDX: MIL Comes On With DTC P2195 or P2197
(Supercedes 05-010, dated July 27, 2011, to update the information marked by the black bars and asterisks).
REVISION SUMMARY
*Under WARRANTY CLAIM INFORMATION, a flat rate time was changed.*
SYMPTOM
The MIL is on, and DTC P2195 (rear air fuel ratio sensor signal stuck lean) or P2197 (front air fuel ratio sensor signal stuck lean) is set.
PROBABLE CAUSE
The PCM software incorrectly interprets sensor inputs, causing the codes to set.
CORRECTIVE ACTION
Use the PCM software.
SOFTWARE INFORMATION
WARRANTY CLAIM INFORMATION
Failed Part: P/N 37820-RDA-A04
Defect Code: 07201
Symptom Code: 03203
Skill Level: Repair Technician
REPAIR PROCEDURE
NOTE:
* ^ Before you update an PCM, make sure the battery in the vehicle is fully charged.*
^ To prevent PCM damage, do not operate anything electrical (audio system, brakes, A/C, power windows, moonroof, etc.) during the update.
1. Connect the HDS to the DLC, and use the HDS to read and clear the DTCs.
*2. Update the PCM software. Refer to Service Bulletin 01-026, Updating Control Units/Modules.*
3. Do the PCM idle learn procedure:
^ Make sure all electrical items (A/C, audio, rear window defogger, lights, etc.) are off.
^ With the HDS, do the PCM RESET and CKP PATTERN CLEAR.
^ Turn the ignition switch to the ON (II) position for 30 seconds.
^ Start the engine, and let it warm up to its operating temperature (the cooling fans cycle twice).
^ Let the engine idle (throttle closed and all electrical items off) for 10 minutes.
4. Do the low-rpm CKP pattern learn:
^ Test-drive the vehicle on a level road: With the A/T in second gear, decelerate (with the throttle fully closed) from an engine speed of 2,500 rpm down to 1,000 rpm.
^ Stop the vehicle, and put the transmission into Park or Neutral. Set the parking brake. Do not turn off the ignition.
5. Connect the HDS to the DLC, and check the status of PULSAR F/B LEARN:
^ On the Selection Menu, select PGM-FI.
^ On the Mode Menu, select Data List.
^ Check the value of PULSAR F/B LEARN.
^ If the value is Completed, you are finished. Disconnect the HDS.
^ If the value is Not Completed, make sure the engine is at normal operating temperature [the ECT SENSOR (1) value is 176 or higher], and repeat step 4.
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