Encountering an OBD2 error code can be a stressful experience for any Ford Ranger owner. Among the various codes, the B1336 error is a common one that signals potential issues within your vehicle’s system. As a dedicated Ford Ranger owner and car enthusiast, understanding this code is the first step towards effectively diagnosing and resolving the problem. This guide will delve into the specifics of the B1336 OBD2 error, helping you understand its causes, symptoms, and how to approach fixing it.
Understanding the B1336 Code
The B1336 OBD2 code, specifically on a Ford Ranger, typically indicates a problem within the driver’s side door lock actuator circuit. This means the Powertrain Control Module (PCM) or another control module has detected an issue with the electrical circuit that controls the door lock actuator on the driver’s side door.
Example of a generic door lock actuator. Actual Ford Ranger actuator may vary.
What are the Common Symptoms of a B1336 Error?
When the B1336 code appears, you might notice several symptoms, including:
- Driver’s side power door lock malfunction: The most obvious symptom is that the driver’s side door lock may not lock or unlock properly using the power door lock switch or remote key fob. It might be intermittent or completely unresponsive.
- Unusual noises from the door: You may hear clicking, grinding, or whirring noises coming from inside the driver’s side door when attempting to lock or unlock it.
- Security system issues: In some cases, the vehicle’s security system might be affected, leading to false alarms or the system not arming correctly.
- Interior lights problems: Issues with door lock actuators can sometimes indirectly affect interior lighting functions that are linked to door operation.
Possible Causes of the B1336 Error
Several factors can trigger the B1336 code in your Ford Ranger. Identifying the root cause is crucial for an effective repair. Here are some common culprits:
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Faulty Door Lock Actuator: The most frequent cause is a failing or failed door lock actuator itself. Over time, these actuators can wear out, their internal motors can fail, or their mechanisms can become jammed.
Example of wiring connected to a door lock actuator. Inspect for damage.
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Wiring Problems: Issues within the wiring harness that connects to the door lock actuator can also cause the B1336 code. This includes:
- Short circuits: Wires can become damaged, causing a short circuit in the actuator circuit.
- Open circuits: Wires can break or become disconnected, leading to an open circuit.
- Corrosion: Corrosion in connectors or wiring can increase resistance and disrupt the electrical signal.
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GEM (Generic Electronic Module) Issues: In some Ford Ranger models, the GEM controls various body electrical functions, including power door locks. A malfunctioning GEM could incorrectly trigger the B1336 code or be the source of the problem if it’s not properly signaling the door lock actuator.
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Key Fob or Remote Keyless Entry Problems: While less common, issues with the remote keyless entry system or the key fob itself could, in rare cases, contribute to door lock problems and potentially trigger a B1336 code if the system misinterprets signals.
Diagnosing the B1336 Error on Your Ford Ranger
Diagnosing the B1336 error effectively requires a systematic approach. Here’s a step-by-step guide you can follow:
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OBD2 Scan: Use an OBD2 scanner to confirm the presence of the B1336 code and check for any other related codes. This will give you a starting point for your diagnosis.
Example of an OBD2 scanner being used to read error codes.
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Visual Inspection:
- Inspect Wiring: Carefully examine the wiring harness leading to the driver’s side door lock actuator. Look for any signs of damage, fraying, corrosion, or loose connections. Pay close attention to areas where wires pass through the door jamb, as these are common points of wear and tear.
- Check Connectors: Ensure that the electrical connectors to the door lock actuator and the GEM (if accessible) are clean, secure, and free from corrosion.
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Actuator Testing:
- Voltage Test: Use a multimeter to check if the door lock actuator is receiving power and ground when you attempt to lock or unlock the door. If there’s no voltage, the problem might be upstream in the wiring or the control module.
- Actuator Resistance Test: You can also measure the resistance of the actuator itself. Compare this reading to specifications if available, or compare it to the passenger side actuator (assuming it’s working correctly) to identify a potentially faulty actuator.
- Direct Actuator Activation: In some cases, you can carefully apply voltage directly to the actuator (bypassing the vehicle’s wiring) to see if it functions. Caution: Be sure to identify the correct pins and voltage to avoid damaging the actuator or vehicle’s electrical system. Refer to a wiring diagram if necessary.
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GEM Module Check (Advanced): If wiring and actuator tests are inconclusive, and you suspect a GEM issue, this step is more complex and might require professional expertise. It could involve:
- Checking GEM Power and Ground: Ensure the GEM is receiving proper power and ground.
- Signal Testing: Use a scan tool that can access GEM data to see if it is sending the correct signals to the door lock actuator.
- GEM Replacement (Last Resort): GEM replacement is usually a last resort and often requires programming to match your vehicle’s specific configuration.
Troubleshooting and Fixing the B1336 Error
Once you’ve diagnosed the likely cause, you can proceed with repairs. Here are common fixes for the B1336 error:
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Door Lock Actuator Replacement: If the actuator is faulty, replacement is usually necessary.
- Purchase the Correct Actuator: Ensure you buy the correct door lock actuator for your Ford Ranger model and year.
- Installation: Follow a repair manual or online guide specific to your Ford Ranger for removing the door panel and replacing the actuator. This typically involves disconnecting electrical connectors, removing mounting screws or bolts, and installing the new actuator in reverse order.
Example showing door panel removal for access to internal components.
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Wiring Repair: If wiring issues are found:
- Repair Damaged Wires: Repair any broken or frayed wires by splicing in new wire sections and using proper connectors or soldering and heat-shrinking.
- Clean Corroded Connectors: Clean corroded connectors with electrical contact cleaner and ensure they are securely reconnected.
- Harness Replacement: In severe cases of wiring damage, replacing sections of the wiring harness might be necessary.
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GEM Module Repair or Replacement (Professional): If the GEM is diagnosed as faulty, repair or replacement should ideally be done by a qualified automotive technician. GEM replacement often requires programming to match your vehicle’s VIN and options.
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Key Fob/Remote Troubleshooting: If you suspect key fob issues:
- Battery Replacement: Try replacing the battery in your key fob.
- Key Fob Reprogramming: In some cases, the key fob might need to be reprogrammed to the vehicle’s system. Refer to your owner’s manual or a locksmith for key fob programming procedures.
Preventing Future B1336 Errors
Preventing future B1336 errors and other electrical issues involves some basic maintenance and care:
- Regular Vehicle Checks: Periodically inspect your vehicle’s electrical system, especially wiring in door jambs and under the hood, for any signs of wear, damage, or corrosion.
- Protect Wiring from Damage: Ensure wiring is properly routed and secured to prevent chafing or damage from movement or environmental factors.
- Address Water Leaks: Fix any water leaks into the vehicle cabin or doors promptly, as moisture can accelerate corrosion in electrical components and wiring.
- Professional Inspections: During routine servicing, ask your mechanic to include a basic check of the vehicle’s electrical system, including door lock function and wiring condition.
Conclusion
The B1336 OBD2 error on your Ford Ranger, while potentially concerning, is often related to manageable issues, most commonly a faulty door lock actuator or wiring problems. By understanding the symptoms, causes, and diagnostic steps outlined in this guide, you can approach troubleshooting this error with confidence. While some repairs are DIY-friendly, especially actuator replacement and basic wiring fixes, more complex issues like GEM module problems might require professional automotive service. Addressing the B1336 error promptly will ensure the proper functioning of your Ford Ranger’s door locks and security system, contributing to both convenience and vehicle safety.
