A common issue Mini Cooper owners face is a no-start condition accompanied by the P1692 fault code. This article explores a real-world scenario of a 2006 R53 Mini Cooper experiencing this problem and outlines the troubleshooting steps taken. We’ll delve into the symptoms, potential causes, and solutions for this frustrating issue.
Understanding the P1692 Code in a Mini Cooper
The P1692 code in a Mini Cooper often indicates a communication error between the Electronic Control Module (ECM) and the Drive-by-Wire (DBW) throttle system. While this code doesn’t pinpoint a specific component failure, it suggests a problem within the electronic throttle control circuitry. In this case, the problem started with a noticeable “pop” sound, engine stall, and a cracked MSD ignition coil.
Initial Troubleshooting Steps
The owner’s first response was to replace the visibly damaged ignition coil. However, this didn’t resolve the no-start issue. Further investigation with an OBD2 scanner revealed the persistent P1692 code. Additional symptoms observed included:
- Zero RPM While Cranking: Despite the engine turning over, the OBD2 scanner showed no RPM signal, indicating a potential Crankshaft Position Sensor (CPS) problem.
- Fuel System Status OL (Open Loop): This indicates the engine is not receiving fuel or the fuel system is not functioning correctly.
- Clicking Sounds from Fuse Panel: Clicking noises near the driver-side fuse panel suggested a possible issue with the fuel pump relay or other related relays.
- Burning Electronics Smell: A lingering smell of burnt electronics indicated potential damage to an electrical component.
Further Diagnosis and Component Replacement
Based on the symptoms, the owner replaced the Crankshaft Position Sensor. Unfortunately, this didn’t solve the zero RPM reading or the no-start condition. The persistent zero RPM reading points to a potential issue in the wiring to the sensor, a faulty sensor itself (despite replacement), or even a problem within the ECM.
Potential Causes of P1692 and Next Steps
Given the unsuccessful attempts to fix the issue, further diagnosis is needed. Potential causes for the P1692 code and the no-start condition in this Mini Cooper could include:
- Wiring Harness Issues: Damaged or corroded wiring in the DBW system or to the CPS can disrupt communication and cause a no-start.
- Faulty ECM: A malfunctioning ECM can cause a range of problems, including communication errors and fuel system issues.
- Fuel Pump or Relay Problems: The clicking from the fuse box and the “OL” fuel system status warrant further investigation of the fuel pump, relay, and associated wiring.
- Grounding Issues: Poor grounding can lead to various electrical problems, including those related to the DBW system.
Conclusion
Troubleshooting a P1692 code in a Mini Cooper requires a systematic approach. While replacing common failure points like the ignition coil and CPS is a good starting point, further diagnosis is often necessary. Checking the wiring harness, testing the fuel system components, verifying good grounding, and potentially testing the ECM are crucial steps in resolving this complex issue. If you’re facing a similar problem, consult a qualified Mini Cooper specialist for accurate diagnosis and repair.
