Exhaust Pressure Sensor Circuit Low (Generic)
The P4037 code means the vehicle's onboard diagnostic system has detected: Exhaust Pressure Sensor Circuit Low (Generic). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $80 - $350 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Incorrect DPF soot load calculation
- Delayed or missed DPF regeneration
- Increased backpressure not detected
Probable Causes (Ranked by Likelihood)
- Short to ground in pressure sensor circuit Very High
- Clogged pressure sense tube High
- Failing sensor element Moderate
- Water in pressure tube Low
Step-by-Step Diagnostic Procedure
-
Check sensor signal voltage
-
Inspect pressure sense tubes for blockage or water
-
Test for shorts to ground in wiring
-
Clean or replace pressure sense tubes
Frequently Asked Questions
Can a clogged tube cause P4037?
Yes, blocked pressure sense tubes are a very common cause.
Can I clean the pressure sense tubes?
Yes, the tubes can be removed and blown out with compressed air.
Can I drive with P4037?
You can drive short distances but the DPF may not regenerate when needed.
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