B1270
Servo Motor Potentiometer Defrost Circuit Short To Battery
B1270 is an OBD-II diagnostic trouble code meaning: Servo Motor Potentiometer Defrost Circuit Short To Battery. Common causes: damage to potentiometer circuit wiring harness, short circuit to battery positive. Estimated repair cost: $56–167.
Symptoms
- Windshield heating/wiping system failure
- Incorrect operation of climate control dampers
- Windshield fogging
- Error indication on the instrument panel
Causes
- Damage to potentiometer circuit wiring harness
- Short circuit to battery positive
- Oxidation of potentiometer contacts
- Malfunction of the potentiometer itself
- Problems with the damper servomotor
How to Fix
- Check the integrity of the potentiometer circuit wiring harness
- Measure resistance and voltage on potentiometer
- Inspect contacts for oxidation
- Check the operation of the servo drive
- If necessary, replace the potentiometer or servomotor
- Reset the error and test the system
Related codes
FAQ
What does the B1270 code mean?
B1270 is an OBD-II diagnostic trouble code that indicates: Servo Motor Potentiometer Defrost Circuit Short To Battery
What causes a B1270 error code?
The most common causes of B1270 include: Damage to potentiometer circuit wiring harness; Short circuit to battery positive; Oxidation of potentiometer contacts; Malfunction of the potentiometer itself.
How do I fix a B1270 diagnostic trouble code?
To fix B1270: Check the integrity of the potentiometer circuit wiring harness. Measure resistance and voltage on potentiometer. Inspect contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1270?
Limited driving only, diagnose soon
How much does it cost to fix B1270?
The estimated repair cost for B1270 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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