C1532 on 2016-2022 Mercedes-Benz GLE (GLE 300d, GLE 350, GLE 400, GLE 450, GLE 350 4MATIC, GLE 450 4MATIC) — Power Steering ECU Malfunction
1 vehicles · 1 makes · $400-$5,000 repair
Most Reported On
C1532 is an OBD-II diagnostic trouble code meaning “Power Steering ECU Malfunction.” Manufacturer-specific chassis code, documented by Toyota/Lexus on electric power steering (EPS) systems as C1532/25 — an ECU internal malfunction relating to a peripheral circuit inside the power steering ECU (paired in service information with C1531/25). The ECU monitors itself and sets the code on an internal fault; on affected models it shuts off the built-in motor relay circuit and stops power assist, making the steering noticeably heavy while the car remains steerable, though some Toyota manuals note assist can continue with this DTC stored. Toyota also uses C1532 with a different sub-code (/32) for a VGRS (variable gear ratio steering) ECU malfunction on some models, and other makes use C1532 for unrelated faults — Subaru documents C1532 as "BLS on stuck," a brake light switch signal stuck on. Confirm against service information for the actual make and model. This code is most commonly reported on 2016-2022 Mercedes-Benz GLE (GLE 300d, GLE 350, GLE 400, GLE 450, GLE 350 4MATIC, GLE 450 4MATIC), with repair costs ranging from $400 to $5,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
C1532 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does C1532 mean?
C1532 stands for "Power Steering ECU Malfunction." Manufacturer-specific chassis code, documented by Toyota/Lexus on electric power steering (EPS) systems as C1532/25 — an ECU internal malfunction relating to a peripheral circuit inside the power steering ECU (paired in service information with C1531/25). The ECU monitors itself and sets the code on an internal fault; on affected models it shuts off the built-in motor relay circuit and stops power assist, making the steering noticeably heavy while the car remains steerable, though some Toyota manuals note assist can continue with this DTC stored. Toyota also uses C1532 with a different sub-code (/32) for a VGRS (variable gear ratio steering) ECU malfunction on some models, and other makes use C1532 for unrelated faults — Subaru documents C1532 as "BLS on stuck," a brake light switch signal stuck on. Confirm against service information for the actual make and model.
What are the most common causes of C1532?
The most common causes of C1532 are: Internal failure of the electric power steering ECU (most common; usually requires ECU/column assembly replacement), Poor power supply or ground to the EPS ECU (corroded, loose, or damaged connector), Low or unstable battery/charging system voltage, Damaged wiring harness between the EPS ECU and the steering assist motor, Water intrusion or corrosion at the steering column / ECU connector, Incomplete or missing ECU initialization / torque sensor zero-point calibration after service. The specific cause varies by vehicle.
How much does it cost to fix C1532?
Repair costs for C1532 range from $400 to $5,000, depending on the vehicle and root cause.
Which vehicles are affected by C1532?
Au7o has documented C1532 across 1 vehicle models from 1 manufacturers: Mercedes-Benz.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.