What Does P2077 Mean?
The PCM is detecting an abnormally low voltage signal from the intake manifold tuning valve position sensor circuit on Bank 1. This typically indicates a short to ground or sensor failure.
Common Causes
35%
Wiring short to ground in IMT sensor circuit
30%
Failed IMT position sensor with internal short
20%
Corroded or damaged sensor connector causing low voltage
10%
Chafed wiring harness rubbing against engine components
5%
PCM internal fault in sensor circuit driver
Diagnostic Steps
1
Step 1: Check voltage at IMT position sensor connector with key on, engine off (should be ~5V reference)
2
Step 2: Inspect sensor connector for corrosion, moisture, bent pins, or damage
3
Step 3: Backprobe sensor signal wire and check for voltage drop to ground (should be high resistance)
4
Step 4: Disconnect sensor and check signal wire resistance to ground (should be infinite/open)
5
Step 5: Test sensor independently by applying reference voltage and measuring output
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM is detecting an abnormally low voltage signal from the intake manifold tuning valve position sensor circuit on Bank 1. This typically indicates a short to ground or sensor failure.
The most common cause of P2077 (Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Low Bank 1) is: Wiring short to ground in IMT sensor circuit
Typical repair costs for P2077 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but performance will be reduced. The PCM will default to a fixed intake configuration, limiting power and fuel efficiency.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2077 to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Air Induction / Variable Intake System
Difficulty
Type
Generic (SAE)
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