P2A33 code meaning
AFCM Power Relay Control Circuit Low
Powertrain system Generic code P2Axx codes Check engine light
What P2A33 means
P2A33 concerns the control line that grounds the coil of the relay supplying the gas control module. Low means this line already sits near zero volts while the driver is switched off. A chafed wire touching the body is the classic finding; a coil with shorted windings can give the same picture. Since the coil is then permanently grounded, the relay may stay energised after the key is off, keeping the gas module awake and draining the battery overnight. Nobody publishes this code for a production gas system. Saab's GM Europe V6 manual, written for the engine relay twin P0686, lets the test run only between 10 and 18 V supply with the engine turning above 80 rpm and classes it as a Type C code, meaning no warning lamp there. CARB expects actuator outputs to be checked for such shorts.
P2A33 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2A33
- Check engine light, depending on calibration
- Battery flat after the vehicle has been parked
- Gas module stays active after ignition off
Common causes of P2A33
- Most likelyControl wire chafed through and touching ground
- PossibleShorted turns in the relay coil
- Less likelyMoisture in the relay socket bridging to ground
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Afcm power relayAfcmWiring harness
What each part of P2A33 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. |
| 33 | The exact fault in that area. |
What to do next
- Note P2A33 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 P2A33
What does P2A33 mean?
P2A33 means "AFCM Power Relay Control Circuit Low". P2A33 concerns the control line that grounds the coil of the relay supplying the gas control module. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A33?
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 P2A33 fail an emissions test?
Yes, it can. P2A33 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 P2A33 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2A33 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.