P0345 on GMC
Camshaft Position Sensor Circuit Malfunction (Bank 2)
P0345 on GMC vehicles indicates camshaft position sensor circuit malfunction (bank 2). Au7o has documented this code across 1 GMC model — most commonly on Envoy. P0345 means the engine computer detected a malfunction in the camshaft position sensor circuit on bank 2 (the cylinder bank not containing cylinder number one). The camshaft position sensor tells the computer where the camshaft is in its rotation, which it uses for precise fuel injection and ignition timing and to manage cylinder identification. When the signal is missing, erratic, or out of range, the computer can't reliably track cam position, which may cause hard starting, rough running, stalling, or a no-start. The fault is usually in the sensor, its wiring, or the connector rather than the camshaft itself. Typical repair costs on GMC range from $80 to $300, depending on the specific model and root cause.
Common Causes of P0345
- •Failed camshaft position sensor (bank 2)
- •Damaged wiring, connector, or corrosion in the sensor circuit
- •Metal debris or oil contaminating the sensor tip
- •Faulty reluctor/tone wheel on the camshaft
- •Open or short in the sensor signal or power circuit
- •Loose timing chain/belt or VVT issue affecting cam timing
- •Poor ground or low reference voltage to the sensor
P0345 on GMC by Model
GMC Envoy(1 issue)
- 4.2L I6 Crankshaft Position Sensor Failure and Stalling2002-2009
The 4.2L LL8 inline-6 engine in the 2002-2009 GMC Envoy is notorious for crankshaft position sensor failures that cause intermittent stalling and no-start conditions. The sensor is located on the side of the engine block and is exposed to heat soak from the exhaust manifold, accelerating its failure. A failing sensor causes the PCM to lose track of crank position, resulting in the engine cutting out without warning — often at highway speed. The issue tends to be intermittent at first, making diagnosis challenging. Replacement is straightforward and the part is inexpensive.
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What does P0345 mean on GMC?▼
P0345 stands for "Camshaft Position Sensor Circuit Malfunction (Bank 2)." P0345 means the engine computer detected a malfunction in the camshaft position sensor circuit on bank 2 (the cylinder bank not containing cylinder number one). The camshaft position sensor tells the computer where the camshaft is in its rotation, which it uses for precise fuel injection and ignition timing and to manage cylinder identification. When the signal is missing, erratic, or out of range, the computer can't reliably track cam position, which may cause hard starting, rough running, stalling, or a no-start. The fault is usually in the sensor, its wiring, or the connector rather than the camshaft itself. On GMC specifically, this code is documented across 1 model.
What causes P0345 on GMC vehicles?▼
Common causes on GMC: Failed camshaft position sensor (bank 2), Damaged wiring, connector, or corrosion in the sensor circuit, Metal debris or oil contaminating the sensor tip, Faulty reluctor/tone wheel on the camshaft, Open or short in the sensor signal or power circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0345 on a GMC?▼
Repair costs on GMC range from $80 to $300, depending on the specific model and root cause.
Which GMC models have P0345 documented?▼
Au7o has documented P0345 on 1 GMC model: Envoy.