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OBD Code C1246

TPMS Sensor Not Learned

CodeC1246
DescriptionTPMS Sensor Not Learned
Possible CausesSensors not paired after rotation or replacement
SymptomsIncorrect tire positions|TPMS inaccurate
SystemChassis

What Does C1246 Mean?

TPMS Sensor Not Learned. This diagnostic trouble code (DTC) is stored when the vehicle's onboard computer detects an issue with the chassis.

Code Breakdown

C = Chassis code

1 = Manufacturer-specific

How to Fix C1246

Follow these diagnostic steps to identify and resolve the issue. Always start with the simplest checks before moving to more involved repairs.

  1. Check all tire pressures with a gauge and inflate to the specification on the door jamb sticker.
  2. If a specific sensor is indicated, that TPMS sensor battery may be dead (they last 5-10 years).
  3. Perform a TPMS relearn procedure after rotating tires or replacing sensors.
  4. Check the TPMS antenna and receiver module if all sensors show no signal.
  5. Replace the faulty TPMS sensor and relearn.
  6. Clear codes and drive above 15 mph for several minutes to verify.

Note: These are general diagnostic guidelines. Some vehicles may have model-specific procedures. Always consult your vehicle's service manual for exact specifications and torque values. If you are not comfortable performing these steps, visit a qualified mechanic.

Frequently Asked Questions

Is C1246 serious?

C1246 is generally considered a low-severity code. While it should still be addressed, it is unlikely to cause immediate safety concerns. However, ignoring it long-term may lead to higher emissions or reduced fuel economy.

Can I clear C1246 myself?

You can clear any OBD-II code with a code scanner or by disconnecting the battery for 15-30 minutes. However, clearing the code without fixing the underlying problem will cause it to return — usually within one or two drive cycles. If the code triggered the check engine light, the light will come back on. Fix the root cause first, then clear the code.

How much does it cost to fix C1246?

Repair costs vary widely depending on the root cause. Some fixes are free (like tightening a gas cap) while others can cost several hundred dollars (like replacing a catalytic converter or oxygen sensor). A proper diagnosis with a professional scan tool — not just reading the code — is the first step to getting an accurate repair estimate. Many auto parts stores offer free code reading, but a thorough diagnosis usually requires a mechanic.

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