Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2
The P2033 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the exhaust gas temperature (EGT) sensor located after the diesel particulate filter (DPF) on Bank 1. This sensor monitors exhaust temperature to protect the DPF and other components. A high circuit condition typically means the sensor signal is above the expected range, often due to a short to voltage, internal sensor failure, or wiring issues. This can lead to incorrect DPF regeneration and potential exhaust system damage.
1. Most Common Causes
- Short circuit to reference voltage or battery positive (B+) in the EGT sensor circuit
- Exhaust gas temperature (EGT) sensor internally damaged or with resistance out of specification
- Sensor connector or wiring with excessive resistance, corrosion, or bent pins
- Short circuit between the sensor signal and reference voltage wires
- Intermittent or permanent engine control module (ECM/PCM) failure
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Possible DPF regeneration issues
- Exhaust odor or smoke
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P2033 and check for related codes.
Step 2: Visually inspect the EGT sensor Bank 1 Sensor 2 wiring and connector for damage, corrosion, or shorts.
Step 3: Measure sensor voltage and resistance with a multimeter; compare to manufacturer specs.
Step 4: If sensor and wiring are okay, test the ECM output and consider reprogramming or replacement.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause DPF damage or improper regeneration, leading to costly repairs.
How much does it cost to fix?▼
Replacing the EGT sensor typically costs $150-$300 including parts and labor, depending on vehicle make and model.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.