C1268 — Motor Relay # 1 Circuit Failure

What are the symptoms of C1268?

Drivers most often notice: Check Engine Light on, increased fuel consumption in some cases, the affected system operates intermittently or not at all, possible limp mode depending on the affected component.

How much does it cost to fix C1268?

Repair wiring or connectors — $80–$250; Control module repair — $300–$1,000; Replace the faulty sensor or actuator — $150–$500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Will C1268 clear itself?

Sometimes C1268 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of C1268?

The most common causes are: blown fuse feeding the circuit, poor ground connection, corroded, loose or damaged connector.

How do I diagnose C1268 myself?

Start with a scan: confirm C1268, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the motor relay # 1 circuit, and verify the suspect component against live data before buying parts.

The engine control module keeps an eye on dozens of circuits while you drive, and when something stops behaving correctly in the motor relay number 1 circuit, it logs trouble code C1268. This code belongs to the chassis category, which means it deals with systems like brakes, steering, or suspension rather than the engine itself. The module doesn't set C1268 based on a single bad reading — it needs to see the same fault occur repeatedly under specific conditions before illuminating the warning light. This two-step validation process keeps you from chasing ghost codes while still catching real problems.

When the ECU records C1268, it also captures freeze frame data — essentially a snapshot of engine load, RPM, coolant temperature, and vehicle speed at the exact moment the fault occurred. That snapshot is your roadmap for diagnosis. If the code sets at high RPM with the engine at operating temperature, you know exactly what conditions to reproduce when testing. The motor relay itself controls power delivery to a specific actuator or sensor circuit, and when that circuit fails — whether through a broken wire, bad connection, or component failure — the module detects the abnormal voltage or resistance and sets this code.

Symptoms of C1268

The check engine light is usually the first sign that C1268 has been stored. Beyond the dashboard warning, you might notice the system controlled by motor relay number 1 behaving erratically or not working at all. Fuel consumption sometimes climbs when the affected circuit can't regulate properly. In some vehicles, the module responds to the fault by limiting power or switching to a default mode — often called limp mode — which reduces performance to protect components. The exact symptoms depend on which system motor relay number 1 controls in your specific make and model.

Common Causes

Loose, corroded, or physically damaged connectors rank among the most frequent culprits behind C1268. Moisture and road salt work their way into connectors over time, creating resistance or intermittent contact that the module eventually flags as a fault. Wiring problems — including open circuits, shorts to ground, or shorts to battery voltage — also trigger this code reliably. A blown fuse upstream of the motor relay circuit will obviously prevent proper operation and cause the code to set. On the module side, an internal driver failure can produce the same result even when all the wiring checks out. Finally, the sensor or actuator itself connected to motor relay number 1 may have failed, causing the circuit to draw too much current or present abnormal resistance to the control module.

How to Diagnose C1268

Start by connecting a quality OBD2 scanner and confirming C1268 is present in the stored codes. Record the freeze frame data before clearing anything — that information tells you the driving conditions when the fault appeared. Next, check for any related trouble codes. Multiple codes in the same circuit often point directly to the root cause. It's also worth searching for technical service bulletins specific to your vehicle — manufacturers sometimes publish known issues and software updates that resolve certain C0xxx codes without any physical repair.

Once you've reviewed the codes, perform a thorough visual inspection of the wiring harness and connectors tied to motor relay number 1. Look for chafed insulation, broken strands inside wires, corrosion that looks white or green, and any connectors that don't seat firmly. After the visual check, use a multimeter to measure reference voltage, ground integrity, and signal continuity at the component connector. Compare your readings to what the service manual specifies for that circuit. If everything checks out visually and electrically, try a wiggle test — gently move the harness while monitoring live data on the scanner. A dropping signal or flickering readings indicate a broken wire that only shows up under movement.

Clear the code and complete a full drive cycle that reproduces the conditions captured in the freeze frame data. If C1268 returns, you've confirmed an active fault. If it stays cleared, the problem may have been intermittent.

Repair Options and Costs

For C1268, address the cheapest possibilities before replacing expensive components. Wiring repairs or connector replacement typically run between $80 and $250 depending on accessibility and labor time. If the control module itself has an internal fault in the driver circuit, expect to pay $300 to $1,000 for repair or replacement plus programming. A failed sensor or actuator in the motor relay circuit generally costs $150 to $500 for the part alone, more with labor on difficult-to-reach components.

Putting it all together, fixing C1268 realistically costs anywhere from $80 to $1,000 depending on which part is actually at fault. The vast majority of cases turn out to be simple wiring or connector issues — the $1,000 control module replacement represents the worst-case scenario, not the typical one. Getting an accurate diagnosis before buying parts almost always saves money.

Can You Drive with C1268?

Most vehicles remain drivable when C1268 is active, though you may experience reduced performance, a disabled auxiliary system, or slightly higher fuel consumption. If the fault causes stalling, a no-start condition, or triggers warnings related to brakes or steering, treat it as urgent and have the vehicle towed rather than risk driving it. For mild symptoms, schedule repair within a week or two rather than ignoring the check engine light indefinitely.

Related OBD2 Codes

• C1200: ABS Inlet Valve Coil LF Circuit Short To Battery
• C1201: ABS Inlet Valve Coil LF Circuit Short To Ground
• C1202: ABS Outlet Valve Coil Rear Circuit Failure
• C1203: ABS Outlet Valve Coil Rear Circuit Open
• C1204: ABS Outlet Valve Coil Rear Circuit Short To Battery
• C1205: ABS Outlet Valve Coil Rear Circuit Short To Ground