P1AAE Code - Phase Correlation Fault
Quick Answer
The Starter/Generator Control Module (SGCM) unit is an electronic device that works in conjunction with the electrical subsystem to efficiently perform DC/DC and DC/AC electrical energy conversion and support vehicle functions. Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1AAE indicates Phase Correlation Fault.
- Common causes
- Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1AAE Description
This SGCM will have 2 functions. The first will be monitoring, where the DC voltage is transformed into 3-phase A/C power to the Starter Generator interface. In this case, energy flows from battery 36-volt to Phase 1, Phase 2, Phase 3. The second case will be generating, where the 3-phase A/C power is used to charge the 36 V battery pack. In this case, energy flows from Phase 1, Phase 2, Phase 3 to battery 36-volt. If the values of Starter Generator Speed and Starter Generator Torque are zero, then the Starter Generator Control will be disabled and the Starter Generator Inverter is not transferring or consuming any power.
3-Phase A/C Current will be defined as the current value of Phase 1. The current will be bidirectional, with positive representing discharging the batteries and negative representing charging the batteries.
What are the Possible Causes of the DTC P1AAE?
- Faulty Starter/Generator Control Module (SGCM)
- Starter/Generator Control Module (SGCM) harness is open or shorted
- Starter/Generator Control Module (SGCM) circuit poor electrical connection
How to Fix the DTC P1AAE?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1AAE code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P1AAE code?
Need more information on how to fix the P1AAE code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1AAE code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1AAE Buick — Phase Correlation Fault
- P1AAE Cadillac — Phase Correlation Fault
- P1AAE Chevrolet — Phase Correlation Fault
- P1AAE GMC — Phase Correlation Fault
- P1AAE Saturn — Phase Correlation Fault
Frequently Asked Questions about P1AAE Code
1. What is OBDII code P1AAE (Phase Correlation Fault)?
- OBDII code P1AAE indicates a phase correlation fault related to the timing of the camshaft and crankshaft in the engine.
2. What are the common symptoms of a Phase Correlation Fault (P1AAE) code?
- Common symptoms include rough engine idle, poor acceleration, stalling, and potentially a Check Engine Light.
3. What are the possible causes of OBDII code P1AAE (Phase Correlation Fault)?
- Causes can include timing chain or belt issues, camshaft or crankshaft sensor problems, or issues with the variable valve timing system.
4. How can I diagnose the Phase Correlation Fault (P1AAE) code?
- Diagnosing this code typically involves inspecting the timing components, checking sensor readings, and performing a thorough visual inspection of related components.
5. What are some repair tips for fixing OBDII code P1AAE?
- Repair tips may include replacing the timing chain or belt, adjusting timing components, replacing sensors, or addressing any issues with the variable valve timing system.
6. Can driving with a Phase Correlation Fault (P1AAE) code cause further damage to the engine?
- Continuing to drive with this fault can potentially cause damage to the engine over time, as it may affect the timing and performance of critical engine components.
7. Is it safe to ignore the Phase Correlation Fault (P1AAE) code and continue driving?
- It is not recommended to ignore this fault code, as it can lead to decreased engine performance, potential stalling, and increased risk of engine damage.
8. Will resetting the Check Engine Light make the Phase Correlation Fault (P1AAE) disappear permanently?
- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the fault code is likely to reappear.
9. Can a DIY enthusiast repair the Phase Correlation Fault (P1AAE) code at home?
- Depending on the skill level and tools available, some DIY enthusiasts may be able to address this fault themselves, but it is recommended to consult a professional mechanic for proper diagnosis and repair.
10. How much does it typically cost to repair OBDII code P1AAE (Phase Correlation Fault) at a repair shop?
- The cost of repairing this fault can vary depending on the specific cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.
Discuss the causes and fixes for P1AAE OBDII Code
Code P1AAE comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
