What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1B03Resolver Signal / MCPA RationalityP1B03-00Resolver Signal / MCPA RationalityP1B03-00Resolver Signal / MCPA RationalityManufacturer communications
15Original wording in English
JEEP
Reported code forms P1B03
"Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the…
JEEP
Reported code forms P1B03-00
"Flash: Power Inverter Module(PIM) Flash Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic…
JEEP
Reported code forms P1B03-00
"Flash: Power Inverter Module(PIM) Flash Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic…
JEEP
Reported code forms P1B03-00
"Flash: Power Inverter Module(PIM) Flash Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic…
JEEP
Reported code forms P1B03
"Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the…
JEEP
Reported code forms P1B03
"Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the…
Check vehicle applicability
31A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | ELR | 2016 |
| Cadillac | ELR | 2015 |
| Cadillac | ELR | 2014 |
| Chevrolet | MALIBU | 2018 |
| Chevrolet | MALIBU | 2017 |
| Chevrolet | MALIBU | 2016 |
| Chevrolet | VOLT | 2018 |
| Chevrolet | VOLT | 2017 |
| Chevrolet | VOLT | 2016 |
| Chevrolet | VOLT | 2015 |
| Chevrolet | VOLT | 2014 |
| Chevrolet | VOLT | 2013 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.