P2A48 code meaning
Alternative Fuel Tank C Pressure Sensor Circuit Low
Powertrain system Generic code P2Axx codes Check engine light
What P2A48 means
With P2A48 the voltage from the tank C pressure sensor has fallen beneath the lowest value a working sensor ever outputs, even with the cylinder empty. In such three-wire circuits a low reading points to the signal line touching ground, a dead 5 V supply or a short inside the transducer. The gas conversion specialist TransEco attributes its tank A Low code to a sensor shorted to ground and lets the AFCM continue with a fixed 3600 psi substitute while the lamp is on. For the driver, tank C looks drained: the gauge may sink and the module may skip that cylinder although it is still full. No manufacturer documents P2A48 itself. If the reference wire also feeds other sensors, a short elsewhere on it can trigger this code.
P2A48 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor1 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2A48
- Check engine light
- Tank C reported empty despite being filled
- Less gas range than expected
Common causes of P2A48
- Most likelySignal wire of the tank C sensor touching ground
- Possible5 V reference open or shorted by another sensor on the same line
- PossibleInternal short in the tank C transducer
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 pressure sensorWiring harnessAfcm
What each part of P2A48 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. |
| 48 | The exact fault in that area. |
What to do next
- Note P2A48 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 P2A48
What does P2A48 mean?
P2A48 means "Alternative Fuel Tank C Pressure Sensor Circuit Low". With P2A48 the voltage from the tank C pressure sensor has fallen beneath the lowest value a working sensor ever outputs, even with the cylinder empty. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A48?
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 P2A48 fail an emissions test?
Yes, it can. P2A48 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 P2A48 to fix?
Difficulty: hard. A typical repair takes 1 to 3 hours of work. This is a job for a workshop.
Will P2A48 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.