P0320 on Jeep
Ignition/Distributor Engine Speed Input Circuit Malfunction
P0320 on Jeep vehicles indicates ignition/distributor engine speed input circuit malfunction. Au7o has documented this code across 1 Jeep model — most commonly on Wrangler. The ECM/PCM detected a malfunction in the ignition or distributor engine-speed (RPM) input circuit. This circuit supplies the engine-speed reference used for spark timing and fuel control; a general fault here (open, short, or signal loss) is flagged as P0320. On distributorless systems this maps to the crank/ignition RPM reference. Typical repair costs on Jeep range from $60 to $250, depending on the specific model and root cause.
Common Causes of P0320
- •Faulty crankshaft/distributor RPM pickup sensor
- •Damaged wiring or connector in the RPM input circuit
- •Poor ground or corroded connector
- •Faulty ignition module
- •Air gap or damaged reluctor/trigger wheel
P0320 on Jeep by Model
Jeep Wrangler(1 issue)
- 4.0L Crankshaft Position Sensor Thermal Failure — Random Stalling & Hot No-Start1997-2006
The crankshaft position sensor (CPS) on the 4.0L (and 2.5L) inline engines mounts on the transmission bellhousing and is exposed to severe heat soak. As it ages it develops intermittent thermal failure: the engine stalls without warning once hot, then refuses to restart until it cools, after which it runs fine again — a maddening, hard-to-replicate fault. Frequently the CPS fails with NO check-engine light and NO stored code, so it is commonly misdiagnosed. It is a top-searched TJ/early-Wrangler stalling complaint and a roadside-safety concern because the stall is sudden.
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View P0320 across all makes →Frequently Asked Questions
What does P0320 mean on Jeep?▼
P0320 stands for "Ignition/Distributor Engine Speed Input Circuit Malfunction." The ECM/PCM detected a malfunction in the ignition or distributor engine-speed (RPM) input circuit. This circuit supplies the engine-speed reference used for spark timing and fuel control; a general fault here (open, short, or signal loss) is flagged as P0320. On distributorless systems this maps to the crank/ignition RPM reference. On Jeep specifically, this code is documented across 1 model.
What causes P0320 on Jeep vehicles?▼
Common causes on Jeep: Faulty crankshaft/distributor RPM pickup sensor, Damaged wiring or connector in the RPM input circuit, Poor ground or corroded connector, Faulty ignition module, Air gap or damaged reluctor/trigger wheel. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0320 on a Jeep?▼
Repair costs on Jeep range from $60 to $250, depending on the specific model and root cause.
Which Jeep models have P0320 documented?▼
Au7o has documented P0320 on 1 Jeep model: Wrangler.