The dreaded “check engine” light illuminating on your Audi’s dashboard can be a cause for concern. When accompanied by the 17700 Audi fault code, it specifically signals a problem within your car’s engine control unit (ECU), particularly related to the bank 2 camshaft position sensor (CMP) circuit. This guide is here to demystify the 17700 fault code, explain its potential causes, and provide you with actionable steps to address it effectively.

Decoding the 17700 Audi Fault Code

The 17700 fault code, often accompanied by the description “Bank 2 Camshaft Position Sensor (CMP) Circuit – Range/Performance Problem,” indicates that the engine control unit (ECU) has detected an issue with the signal coming from the bank 2 camshaft position sensor.

The camshaft position sensor plays a crucial role in engine timing. It monitors the rotational speed and position of the camshaft, providing this information to the ECU. The ECU then uses this data to regulate fuel injection and ignition timing for optimal engine performance. When the sensor’s signal falls outside the expected range or exhibits inconsistent behavior, the 17700 fault code is triggered.

Common Causes of the 17700 Audi Fault Code

Several factors can contribute to the 17700 Audi fault code, ranging from simple electrical glitches to more complex mechanical issues. Here are some of the most common culprits:

• Faulty Camshaft Position Sensor: A malfunctioning sensor can send inaccurate or intermittent signals to the ECU, triggering the fault code.
• Wiring Issues: Damaged, corroded, or loose wiring within the CMP sensor circuit can disrupt the signal transmission, leading to the error code.
• Timing Belt/Chain Problems: A stretched, worn, or misaligned timing belt or chain can affect the synchronization between the crankshaft and camshaft, impacting sensor readings and triggering the code.
• Faulty ECU: In rare cases, a problem within the engine control unit itself can cause various electrical malfunctions, including the 17700 fault code.

Troubleshooting and Resolving the 17700 Audi Fault Code

Addressing the 17700 fault code typically involves a systematic approach to diagnose and rectify the underlying issue. Here’s a step-by-step guide to help you troubleshoot the problem:

1. Retrieve Fault Codes: Use an OBD-II scanner to retrieve the stored fault codes from your Audi’s ECU. This will confirm the presence of the 17700 code and may reveal any accompanying codes that can provide further insight into the problem.

2. Inspect the Camshaft Position Sensor: Locate the bank 2 camshaft position sensor, usually positioned near the cylinder head. Inspect it for any visible damage, debris, or oil contamination.

3. Check the Wiring and Connectors: Carefully examine the wiring harness and connectors associated with the CMP sensor. Look for any signs of damage, loose connections, corrosion, or frayed wires.

Audi Wiring Harness Inspection

4. Test the Camshaft Position Sensor: Use a multimeter to test the sensor’s resistance and voltage output. Refer to your vehicle’s service manual for specific test procedures and acceptable value ranges.

5. Inspect the Timing Belt/Chain: If the sensor and wiring appear to be in order, inspect the timing belt or chain for signs of wear, stretching, or misalignment. Consult your service manual for proper inspection procedures.

6. Consult a Professional: If the issue persists despite these troubleshooting steps, it’s advisable to seek assistance from a qualified Audi technician or a specialized mechanic. They have the expertise and equipment to perform more advanced diagnostics and repairs, potentially including ECU testing or replacement.

Conclusion

The 17700 Audi fault code, indicating a problem within the bank 2 camshaft position sensor circuit, can be a cause for concern for any Audi owner. However, armed with the knowledge presented in this guide, you’re better equipped to understand the issue, explore potential causes, and take appropriate steps to address it. Remember, a systematic approach to troubleshooting, combined with the right tools and guidance, can help you resolve the problem and restore your Audi’s optimal performance.

If you’re located near Arvada, Colorado, and require expert assistance with your Audi, feel free to contact VCDStool at +1 (641) 206-8880 and our email address: vcdstool@gmail.com. Our team of skilled technicians is here to help you get back on the road with confidence. You can also visit our office located at 6719 W 70th Ave, Arvada, CO 80003, USA.

FAQs

1. Can I continue driving my Audi with the 17700 fault code?

It’s not advisable to ignore the 17700 fault code or continue driving your Audi for extended periods with it active. Driving with a faulty camshaft position sensor can lead to reduced engine performance, increased emissions, and potential engine damage in severe cases.

2. How much does it cost to fix the 17700 Audi fault code?

The cost of repair can vary significantly depending on the underlying cause and the labor rates in your area. A simple sensor replacement might be relatively affordable, while a more complex issue like a timing belt replacement can be more expensive.

3. Can I replace the camshaft position sensor myself?

Replacing the camshaft position sensor can be a DIY project for those with some mechanical skills. However, it’s crucial to have the correct tools and follow the proper procedures outlined in your vehicle’s service manual. If you’re unsure, seeking professional assistance is recommended.

4. How do I prevent the 17700 Audi fault code from recurring?

Regular maintenance, including timely timing belt/chain inspections and replacements, can help prevent issues related to the camshaft position sensor and other engine components.

5. Can the 17700 fault code affect other systems in my Audi?

Yes, a faulty camshaft position sensor can potentially impact other systems controlled by the ECU, such as the variable valve timing system or the emissions control system.