Engine Controls - MIL ON/DTC's P2195/P2197 Set
05-010March 4, 2005
Applies To:
2003-04 MDX - ALL
MDX: MIL Comes On With DTC P2195 or P2197
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 HDS to update the PCM software.
SOFTWARE INFORMATION
WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies.
Failed Part: P/N 37820-RDA-A04
Defect Code: 07201
Symptom Code: 03203
Skill Level: Repair Technician
Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.
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. Use the HDS to update the PCM:
^ If not already done, load software update 1.016.006 or later onto the HDS.
^ In the HDS main screen, click on the reprogramming icon.
^ In the System Selection menu, select PGM-FI, and click on the confirmation check mark.
^ In the screen that shows the new program, click on the confirmation check mark.
^ In the Confirm the Control Module Update screen, click Yes.
^ When the programming is complete, click on the confirmation check mark.
NOTE:
Do not disconnect the HDS, and do not turn off the ignition switch.
^ In the Updating Honda Control Modules with HDS Tablet screen, click on the confirmation check mark.
^ Wait until the programming is complete. This programming takes about 10 minutes.
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.