Code P0868

Tiny
BCMULLEN95
  • MEMBER
  • 2008 MITSUBISHI LANCER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 186,000 MILES
My car is showing a code for P0868. I am not sure exactly what to look for to narrow down a part or the transmission. Can some one give me some direction on where to start? Thank you
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Monday, August 24th, 2020 AT 12:32 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

The CVT transmission is one that most guys will not touch. This code is for the secondary pump inside.

https://www.2carpros.com/articles/automatic-transmission-problems

If that is the case, the best result is to replace it.

I have a few and they are not easy but expensive. The dealer also recommends replacing it as well. They will not open one up and do any parts replacing at all.

Roy

DTC SET CONDITIONS

Check Conditions
Engine speed: 450 r/min or more.
Voltage of battery: 9 volts or more.
Voltage of battery: 16 volts or less.
Secondary pulley speed sensor: normal.
Primary pulley speed sensor: normal.
Stepper motor: normal.
Line pressure solenoid valve: normal.
Secondary pressure solenoid valve: normal.
CAN communication status: normal.
Primary pressure sensor: normal.
Secondary pressure sensor: normal.
Primary or secondary pressure sensor performance: normal.
Secondary pressure sensor performance: normal.

Judgement Criteria
Secondary linear solenoid performance fail [target secondary pressure-measured secondary pressure: 0.25 MPa (36 psi) or more. (1.52 seconds)]: 2 count or more.

OBD-II DRIVE CYCLE PATTERN
All the conditions below continue for 3 seconds.
When the secondary pressure drops, torque down is permitted.
The secondary pressure drop judgement is possible.

PROBABLE CAUSES
Damaged wiring harness and connectors
Malfunction of CVT assembly
Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Check other diagnosis codes.

Q: Are other diagnosis codes set?
YES: Go to the appropriate troubleshooting.
NO: Go to Step 2.

STEP 2. Check the following connector:
B-08 CVT assembly connector
C-40 TCM connector
A-09 Intermediate connector

Check contacts for internal short circuit.

Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the defective connector.

STEP 3. Check for short to ground in the wiring harness between the TCM connector and the CVT assembly connector.
Between C-40 TCM connector (terminal No.39) and B-08 CVT assembly connector (terminal No.7)

OK: 100 Ohms or more

Q: Is the check result normal?
YES: Go to Step 4.
NO: Repair the wiring harness.

STEP 4. Symptom recheck after erasing diagnosis code

Q: Is the check result normal?
YES: Intermittent malfunction
NO: Replace the TCM, and then go to Step 5.

STEP 5. Retest the system.

Q: Is the check result normal?
YES: The inspection is complete.
NO: Replace the CVT assembly.
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Monday, August 24th, 2020 AT 1:39 PM

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