P08D2 code meaning
Shift Solenoid J Control Circuit Low
Powertrain system Generic code P08xx codes Check engine light
What P08D2 means
Set when the TCM sees too little voltage on the control line of shift solenoid J, typically because the line or the coil is shorted to ground. No manufacturer documents this code publicly; J would be a tenth on/off valve, which none of the known transmission sources assigns. GM's analogue for solenoid A, P0973 on the 6-speed units, fails when the output driver reports a ground short for 1.2 of 1.5 seconds and lights the MIL after one trip; Ford names the same fault on its solenoids a short to ground. CARB requires such circuit checks. P08D3 is the high-side fault, P08D4 the open circuit. The TCM usually switches the valve off and runs a substitute gear.
P08D2 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P08D2
- Check engine or transmission warning light on
- Transmission holds a substitute gear
- Harsh or missing shifts
Common causes of P08D2
- Most likelyControl wire chafed through and shorted to ground
- PossibleSolenoid coil with internal short
- PossibleDamaged internal transmission harness or lead frame
- Less likelyFaulty output stage in the TCM
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift solenoid jWiring harness
What each part of P08D2 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| D2 | The exact fault in that area. |
What to do next
- Note P08D2 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P08D2
What does P08D2 mean?
P08D2 means "Shift Solenoid J Control Circuit Low". Set when the TCM sees too little voltage on the control line of shift solenoid J, typically because the line or the coil is shorted to ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P08D2?
Drive gently and only to a workshop. With P08D2 the car can go into limp mode (reduced power) to protect itself.
Will P08D2 fail an emissions test?
Yes, it can. P08D2 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P08D2 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P08D2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.