Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2
The P2032 code indicates that the Engine Control Module (ECM) has detected a low 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 low circuit condition typically means the sensor signal is below the expected range, often due to a short to ground, faulty sensor, or wiring issues. This can lead to incorrect DPF regeneration and potential emissions system damage.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to ground in sensor wiring or connector
- Corroded or damaged sensor connector
- ECM software or hardware issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Possible DPF regeneration issues
- Engine may enter limp mode
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the EGT sensor connector and wiring for damage, corrosion, or shorts.
Step 3: Measure sensor resistance and compare to manufacturer specifications (typically 100-200k ohms at room temperature).
Step 4: Check for voltage at the sensor connector with key on; should be around 5V reference signal. If low, check for short to ground.
Step 5: If sensor and wiring are okay, test ECM output and consider reprogramming or replacement.
04. Commonly Affected Makes
05. 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 and reduced performance. Short trips may be okay, but immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY sensor replacement, or $150 to $300 at a shop including labor.