P2691 moderate

Exhaust Pressure Sensor Circuit Range/Performance

The P2691 code means the vehicle's onboard diagnostic system has detected: Exhaust Pressure Sensor Circuit Range/Performance. This is a moderate severity code.

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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
  • Incorrect DPF regeneration intervals
  • Engine power may fluctuate
  • Fuel economy reduced during unnecessary regen
  • DPF warning light may illuminate

Probable Causes (Ranked by Likelihood)

  • Exhaust pressure sensor hose partially blocked Very High
  • Sensor reading drifted out of calibration High
  • Exhaust leak before sensor location Moderate
  • DPF partially clogged affecting pressure readings Moderate

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2691 is stored

  2. Compare exhaust pressure readings at idle and under load to specifications

  3. Clean or replace exhaust pressure sensor hose

  4. Check for exhaust leaks before the sensor

Frequently Asked Questions

What does P2691 mean?

P2691 indicates an issue with the exhaust pressure sensor circuit range/performance. This is related to the diesel exhaust aftertreatment system that controls emissions and DPF operation.

Can I drive with a P2691 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 P2691?

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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