P0340 on Jeep
Camshaft Position Sensor Circuit Malfunction
P0340 on Jeep vehicles indicates camshaft position sensor circuit malfunction. Au7o has documented this code across 1 Jeep model — most commonly on Wrangler. This code means the engine computer lost or received an erratic signal from the camshaft position sensor. That sensor tells the computer the exact position and speed of the camshaft, which it uses together with the crankshaft sensor to time fuel injection and spark precisely. When the camshaft signal is missing, intermittent, or out of range, the computer sets P0340. Symptoms often include hard starting, stalling, rough running, or a no-start because the engine can't time itself correctly. Typical repair costs on Jeep range from $350 to $2,500, depending on the specific model and root cause.
Common Causes of P0340
- •Failed camshaft position sensor
- •Corroded or loose sensor connector
- •Damaged or shorted sensor wiring
- •Bad reluctor/tone ring on the camshaft
- •Loose timing chain/belt or jumped timing
- •Metal debris or oil contamination on the sensor tip
- •Poor sensor power or ground supply
- •Faulty PCM/ECM (rare)
P0340 on Jeep by Model
Jeep Wrangler(1 issue)
- OPDA/Camshaft Synchronizer Failure Causing Squeal and Cam Gear Wear2005-2006
Late-TJ 4.0L Wranglers are well known for Oil Pump Drive Assembly (OPDA) failures, often described by owners as the 'screaming monkey' chirp or squeal from the engine bay. The OPDA can bind or wear internally, which may damage the camshaft gear and affect oil pump drive timing. If ignored, the issue can escalate from noise and check-engine lights to expensive internal engine repair.
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What does P0340 mean on Jeep?▼
P0340 stands for "Camshaft Position Sensor Circuit Malfunction." This code means the engine computer lost or received an erratic signal from the camshaft position sensor. That sensor tells the computer the exact position and speed of the camshaft, which it uses together with the crankshaft sensor to time fuel injection and spark precisely. When the camshaft signal is missing, intermittent, or out of range, the computer sets P0340. Symptoms often include hard starting, stalling, rough running, or a no-start because the engine can't time itself correctly. On Jeep specifically, this code is documented across 1 model.
What causes P0340 on Jeep vehicles?▼
Common causes on Jeep: Failed camshaft position sensor, Corroded or loose sensor connector, Damaged or shorted sensor wiring, Bad reluctor/tone ring on the camshaft, Loose timing chain/belt or jumped timing. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0340 on a Jeep?▼
Repair costs on Jeep range from $350 to $2,500, depending on the specific model and root cause.
Which Jeep models have P0340 documented?▼
Au7o has documented P0340 on 1 Jeep model: Wrangler.