P0637 OBD-II: Power Steering Control Circuit High
P0637 Severity
Will P0637 go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P0637?
Despite the code definition provided, most manufactures use this code to identify improper charging system operation. If the engine computer (PCM) detects the Alternator is not providing sufficient output to run the electrical systems on the vehicle and recharge the battery, code P0637 will set.Any non-essential electronics will also be disabled (i.e. Radio, Climate Control)
OBD II Fault Code
- OBD II P0637
OBD-II Code Battery/charging system warning light illuminated is defined as a Power Steering Control Circuit High
Despite the code definition provided, most manufactures use this code to identify improper charging system operation. If the engine computer (PCM) detects the Alternator is not providing sufficient output to run the electrical systems on the vehicle and recharge the battery, code P0637 will set.Any non-essential electronics will also be disabled (i.e. Radio, Climate Control)
Battery/charging system warning light illuminated Symptoms
- Battery/charging system warning light illuminated
- Non-essential electronic devices will be turned off
Common Problems That Trigger the P0637 Code
- Alternator failure
- Powertrain Control Module (PCM) failure
- Wiring issue
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