Fault code C1241 – a step-by-step guide to diagnosing and fixing it

The meaning of error code C1241 – ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground

C1241: Causes, signs and repairs

Error code C1241 is displayed and the check engine light is on - what does this mean?

The DTC C1241 is recognized by the OBD system when there is a problem with the ABS wheel speed sensor or its circuit. This fault code relates to the anti-lock braking system (ABS) and can have specific variations depending on the vehicle manufacturer. The EOBD system registers this fault code if the signal transmission between the sensor and the control unit is faulty.

What causes can this fault code have?

Defective ABS wheel speed sensor
Damaged sensor cable or cable break
Corroded or loose plug connections
Dirty or damaged sensor ring
Defective ABS control unit
Excessive air gap between sensor and sprocket
Mechanical damage to the wheel bearing
Interruption in the ground connection

What symptoms occur in parallel with fault code C1241?

ABS warning light: The ABS indicator light in the dashboard lights up continuously
Locking wheels: The affected wheel may lock when braking
ESP malfunction: The Electronic Stability Program is not working properly
Uneven braking behavior: Lateral pulling of the vehicle when braking
Additional warning lights: ESP or traction control lights may also be activated
Extended braking distances: Reduced braking performance during emergency braking

How can the problem with error code C1241 be rectified?

The repair requires a systematic diagnosis of the ABS system and the affected components.
Sensor replacement: Replace the defective ABS wheel speed sensor with an original spare part and set the air gap correctly
Cable repair: Locate and repair damaged cables or replace the entire wiring harness to the sensor
Clean the plug connection: Clean corroded contacts with contact spray and tighten connection
Replace sensor ring: Replace or clean dirty or damaged ring gear on the wheel bearing
Control unit replacement: If the ABS unit is defective, have the complete control module replaced by a specialist workshop
Wheel bearing repair: Completely replace mechanically damaged wheel bearing including integrated sensor ring

FAQ - Frequently asked questions about DTC C1241

Can I continue driving with error code C1241?

Driving is possible, but the ABS system does not work. The wheels may lock during emergency braking, which increases the risk of an accident. A prompt repair is strongly recommended.

How much does it cost to repair error code C1241?

The costs vary depending on the cause: sensor cleaning €50-80, new ABS sensor €120-250, cable repair €150-300, wheel bearing with sensor ring €200-400 plus labor.

How can I diagnose fault code C1241 myself?

Read out the code with an OBD scanner, then visually check the cables and plug connections. Check the sensor for dirt and measure the air gap (should be 0.5-2mm).

Does the code C1241 disappear after disconnecting the battery?

Disconnecting the battery temporarily deletes the trouble code, but it will return if the root cause has not been rectified. A genuine repair is required.

What tools do I need for the C1241 repair?

OBD diagnostic device, multimeter, basic tools, contact spray, possibly a lift or jack. A specialist workshop is required for programming the control unit.

Can fault code C1241 be caused by the weather?

Yes, moisture and salt can cause corrosion on plug connections. Dirt and metal shavings on the sensor ring also trigger this EOBD error code.

Vehicles in which fault code C1241 occurs most frequently

Error code C1241 is an ABS-specific diagnostic trouble code and can occur in various vehicle brands, but is most common in the following vehicles:

BMW: 3 Series E46/E90, 5 Series E60/F10, X3 E83, X5 E53/E70 (2000-2015)
Mercedes-Benz: C-Class W203/W204, E-Class W211/W212, ML-Class W163/W164 (2001-2014)
Audi: A4 B6/B7/B8, A6 C5/C6, Q5 8R, Q7 4L (2002-2016)
Volkswagen: Golf V/VI, Passat B6/B7, Touareg 7L/7P, Tiguan 5N (2003-2017)
Ford: Focus II/III, Mondeo IV, Kuga I/II, S-Max (2004-2018)
Opel: Astra H/J, Insignia A, Zafira B/C, Antara (2004-2019)
Peugeot: 307, 308, 407, 508, 3008, 5008 (2005-2020)
Renault: Megane II/III, Laguna III, Scenic II/III, Koleos (2006-2021)

If the code C1241 occurs in your vehicle, a quick diagnosis is important, as the ABS system is crucial for driving safety. Although the vehicle remains drivable, you should take extra care when braking and have the fault rectified promptly at a specialist workshop. Most repairs are inexpensive if they are carried out at an early stage.

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