P2A68 code meaning
Alternative Fuel Tank C Level Sensor Circuit Intermittent/Erratic
Powertrain system Generic code P2Axx codes Check engine light
What P2A68 means
The last code of this block covers a tank C level signal that flickers: it is valid most of the time but suffers short gaps or jumps unrelated to fuel movement. On vehicles with three tanks the wiring to tank C is often the longest and has the most joints, each a chance for a loose crimp or green corrosion; frame flex can open a fractured conductor for an instant. Where the level is computed from CNG pressure, a flickering pressure input (P2A4A) can be the real source. No manufacturer documents P2A68; it parallels P2A63 for tank B and P01B3 for tank A, and CARB treats erratic inputs as part of component monitoring. Stored freeze-frame values plus live level data on a test drive narrow it down.
P2A68 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P2A68
- Tank C level jumps on the display
- Check engine light now and then
- Range display unsteady
Common causes of P2A68
- Most likelyLoose crimp or corroded joint in the long tank C harness
- PossibleConductor fractured, opening under frame flex
- Less likelyUnsteady tank C pressure input behind a calculated level (CNG)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel tank c level sensorWiring harnessAfcm
What each part of P2A68 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| A | Area: hybrid propulsion. |
| 68 | The exact fault in that area. |
What to do next
- Note P2A68 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 P2A68
What does P2A68 mean?
P2A68 means "Alternative Fuel Tank C Level Sensor Circuit Intermittent/Erratic". The last code of this block covers a tank C level signal that flickers: it is valid most of the time but suffers short gaps or jumps unrelated to fuel movement. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A68?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2A68 fail an emissions test?
Yes, it can. P2A68 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 P2A68 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2A68 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.