P2A58 code meaning
Alternative Fuel Vaporizer B Outlet Temperature Sensor Circuit High
Powertrain system Generic code P2Axx codes Check engine light
What P2A58 means
Here the signal of the vaporizer B outlet sensor rests at or near the reference voltage, so the module would see a deep-frozen unit. Typical reasons are an open wire, a plug that has backed out, a sensor element that has failed open or a short to a supply line. Telling a wiring fault from a real problem matters on gas engines: CA2862664C warns that coolant inside and next to an LNG heat exchanger may turn to ice during a cold start, and such a frozen vaporizer would also read very cold, though not at the electrical limit. The control unit therefore stops trusting vaporizer B, which can mean reduced gas delivery or a fall-back fuel. AC STAG calls the open case a missing sensor. No manufacturer documents P2A58.
P2A58 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2A58
- Check engine light, depending on calibration
- Gas delivery reduced or fall-back fuel used
- Vaporizer B shown at an impossibly low temperature
Common causes of P2A58
- Most likelyOpen wire or plug of the B sensor backed out
- PossibleVaporizer B sensor element open
- Less likelySignal lead touching a supply line
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel vaporizer b outlet temp sensorWiring harnessAfcm
What each part of P2A58 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. |
| 58 | The exact fault in that area. |
What to do next
- Note P2A58 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 P2A58
What does P2A58 mean?
P2A58 means "Alternative Fuel Vaporizer B Outlet Temperature Sensor Circuit High". Here the signal of the vaporizer B outlet sensor rests at or near the reference voltage, so the module would see a deep-frozen unit. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A58?
Drive gently and only to a workshop. With P2A58 the car can go into limp mode (reduced power) to protect itself.
Will P2A58 fail an emissions test?
Yes, it can. P2A58 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 P2A58 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P2A58 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.