Code U0537 indicates that a control module on the vehicle's communication network is receiving invalid or implausible data from the steering column lock module. The column lock module is part of the vehicle's security/immobilizer system and is responsible for electronically locking and unlocking the steering column. This code means the data it is sending is corrupted, missing, or does not match expected format.
The column lock module itself has internally failed and is transmitting corrupt or no valid data across the communication bus. This is the most common root cause for this code.
Damaged, corroded, or loose wiring and terminals at the column lock module can disrupt power, ground, or communication signals, causing invalid data to be reported.
A problem on the vehicle's communication network — such as a shorted or open bus line, a damaged termination resistor, or interference from another failing module — can corrupt data from the column lock module.
If the column lock module or a related module was recently replaced or reprogrammed incorrectly, a software version or configuration mismatch can cause invalid data errors.
The module receiving the data — typically the BCM or immobilizer controller — may have an internal fault causing it to misinterpret valid data as invalid. This is uncommon but possible.
A powertrain control module failure is extremely unlikely to cause this code. The PCM is not the source of the column lock data and should only be suspected after all other possibilities are definitively ruled out.
In most cases the vehicle will not start or crank, making driving impossible. If the vehicle does run, the steering lock function may be compromised, so diagnosis should not be delayed.
No. Replacing the PCM is almost never the correct fix for this code. The PCM does not generate the column lock data. The problem lies with the column lock module, its wiring, or the communication network. Replacing the PCM without proper diagnosis is a waste of money.
No. The column lock module is integrated into the vehicle's security and immobilizer system. Bypassing it will typically prevent the vehicle from starting and may disable other security functions.
It is relatively uncommon and is typically seen on vehicles equipped with electronic steering column locks as part of an immobilizer system. It is not a generic maintenance-related code.