OBD Guide
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C1850

Air Suspension Warning Lamp Circuit Failure

C1850 is an OBD-II diagnostic trouble code meaning: Air Suspension Warning Lamp Circuit Failure. Common causes: burnt out lamp, open or short circuit in wiring harness. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Inoperative air suspension warning light
  • The lamp is constantly on
  • The lamp does not light up when the ignition is turned on

Causes

  • Burnt out lamp
  • Open or short circuit in wiring harness
  • Problems with the suspension control module
  • Faulty relay or fuse

How to Fix

  1. Check the condition of the lamp and replace if necessary
  2. Check the integrity of the wiring harness to the lamp
  3. Scan the suspension control module on the rear for other fault codes
  4. Check relays and fuses associated with the lamp circuit

Related codes

C1851C1852C1853

FAQ

What does the C1850 code mean?

C1850 is an OBD-II diagnostic trouble code that indicates: Air Suspension Warning Lamp Circuit Failure

What causes a C1850 error code?

The most common causes of C1850 include: Burnt out lamp; Open or short circuit in wiring harness; Problems with the suspension control module; Faulty relay or fuse.

How do I fix a C1850 diagnostic trouble code?

To fix C1850: Check the condition of the lamp and replace if necessary. Check the integrity of the wiring harness to the lamp. Scan the suspension control module on the rear for other fault codes. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1850?

Limited driving only, diagnose soon

How much does it cost to fix C1850?

The estimated repair cost for C1850 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat