Turbo Boost Pressure Not Detected (Dodge)
What does P1692 mean?
The P1692 code means the vehicle's onboard diagnostic system has detected: Turbo Boost Pressure Not Detected (Dodge). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Lack of turbo boost
- Sluggish acceleration
- Black smoke from exhaust under load
- Turbo not spooling up
Probable Causes (Ranked by Likelihood)
- Wastegate stuck open or actuator failure Very High
- Boost leak in intercooler piping or boots High
- Faulty boost pressure sensor Moderate
- Turbocharger bearing failure Low
Step-by-Step Diagnostic Procedure
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Check the wastegate actuator arm for free movement and proper spring tension.
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Inspect all intercooler boots and piping connections for cracks, holes, or loose clamps.
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Measure boost pressure with a mechanical gauge and compare to scan tool reading.
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Test the boost pressure sensor voltage at various RPMs and loads.
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If no leaks are found and the wastegate works, inspect the turbocharger for bearing play or compressor wheel damage.
Frequently Asked Questions
What is the most common cause on Cummins trucks?
Boost leaks from worn intercooler boots are the most frequent cause. The silicone boots at each end of the intercooler piping crack and split over time.
Can I check for boost leaks myself?
Yes. You can pressurize the intercooler system with shop air and listen for leaks, or use soapy water on connections to find bubbles.
Will driving without boost damage the engine?
No immediate damage, but the engine will be significantly underpowered. The ECM may also enrich the fuel mixture excessively, causing black smoke.