Exhaust Pressure Sensor Circuit
The P2690 code means the vehicle's onboard diagnostic system has detected: Exhaust Pressure Sensor Circuit. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $600 (parts and labor)
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Common Symptoms
- Check Engine Light on
- DPF regeneration may not occur properly
- Reduced engine power during regen
- Exhaust back pressure warning
- Possible DPF clogging over time
Probable Causes (Ranked by Likelihood)
- Faulty exhaust pressure sensor Very High
- Damaged wiring to exhaust pressure sensor High
- Sensor hose clogged with soot Moderate
- PCM circuit failure Low
Step-by-Step Diagnostic Procedure
-
Read freeze frame data and confirm P2690 is present
-
Test exhaust pressure sensor output with scan tool
-
Inspect sensor hose for soot blockage
-
Check wiring and connector to exhaust pressure sensor
Frequently Asked Questions
What does P2690 mean?
P2690 indicates an issue with the exhaust pressure sensor circuit. This is related to the diesel exhaust aftertreatment system that controls emissions and DPF operation.
Can I drive with a P2690 code?
You can drive short distances, but the diesel particulate filter system is not operating correctly. Continued driving may cause DPF clogging and expensive repairs.
How much does it cost to fix P2690?
Repairs typically cost $200 - $600. Sensor or wiring repairs are least expensive, while DPF replacement can cost $2,000 to $4,000.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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