P1503
Load Signal From Alternator DF Terminal Implausible Signal
P1503 is an OBD-II diagnostic trouble code meaning: Load Signal From Alternator DF Terminal Implausible Signal. Common causes: generator malfunction, open or short circuit in terminal df circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Unstable engine operation at idle
- Battery charging problems
- Reduced power of electrical equipment
- Periodic malfunctions in the operation of car electronics
Causes
- Generator malfunction
- Open or short circuit in terminal DF circuit
- Poor contact in connectors or corrosion
- Engine control unit (ECU) malfunction
- Relay or fuse problems
How to Fix
- Check the condition of the generator and its terminals
- Inspect the DF terminal circuit for damage.
- Check contacts and connectors for corrosion
- Test the generator on the stand
- If necessary, replace the generator or repair the wiring
Related codes
Error P1503 by Vehicle Brand
FAQ
What does the P1503 code mean?
P1503 is an OBD-II diagnostic trouble code that indicates: Load Signal From Alternator DF Terminal Implausible Signal
What causes a P1503 error code?
The most common causes of P1503 include: Generator malfunction; Open or short circuit in terminal DF circuit; Poor contact in connectors or corrosion; Engine control unit (ECU) malfunction.
How do I fix a P1503 diagnostic trouble code?
To fix P1503: Check the condition of the generator and its terminals. Inspect the DF terminal circuit for damage.. Check contacts and connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1503?
Limited driving only, diagnose soon
How much does it cost to fix P1503?
The estimated repair cost for P1503 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat