P0A67 code meaning
Drive Motor B Phase U Current Low
Powertrain system Generic code P0Axx codes Check engine light
What P0A67 means
P0A67 reports that phase U of drive motor B carries too little current at the moment it should peak, which GM interprets as an open circuit in that phase. In the 2016 Chevrolet Volt tables for motor control processor B the test runs while the rotor is within 30 degrees of the U axis, the inverter is above 50 V in normal PWM and the squared current command exceeds 900 A²; a peak below 9 A for 0.4 s within a 0.6 s window sets a Type A fault with MIL on the first trip. GM's 2018 tables shared by the Volt and the CT6 plug-in keep the test but raise the command threshold to 4,900 A². P0A68 is the high side, P0A6A and P0A6D are phases V and W, P0A5E the motor A counterpart. Motor B is disabled.
P0A67 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1.5 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0A67
- MIL on the first trip and propulsion system warning
- Jerky or weak electric drive, reduced power
Common causes of P0A67
- Most likelyOpen circuit in the phase U cable, connector or terminal of motor B
- PossiblePhase U switch of the motor B inverter not conducting
- PossiblePhase U current sensor stuck at zero
- Less likelyOpen winding of phase U in drive motor B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor b phase uInverter
What each part of P0A67 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A | Area: hybrid propulsion. |
| 67 | The exact fault in that area. |
What to do next
- Note P0A67 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 P0A67
What does P0A67 mean?
P0A67 means "Drive Motor B Phase U Current Low". P0A67 reports that phase U of drive motor B carries too little current at the moment it should peak, which GM interprets as an open circuit in that phase. It is a generic code, so it means the same on every make.
Is it safe to drive with P0A67?
Drive gently and only to a workshop. With P0A67 the car can go into limp mode (reduced power) to protect itself.
Will P0A67 fail an emissions test?
Yes, it can. P0A67 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 P0A67 to fix?
Difficulty: workshop only. A typical repair takes 1.5 to 8 hours of work. This is a job for a workshop.
Will P0A67 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.