P0335 on Kia
Crankshaft Position Sensor A Circuit Malfunction
P0335 on Kia vehicles indicates crankshaft position sensor a circuit malfunction. Au7o has documented this code across 3 Kia models — most commonly on Forte, Optima, Rio. This code means the engine computer has lost or detected a faulty signal from the crankshaft position sensor (sensor A), which tells the computer exactly how fast and in what position the crankshaft is rotating. That signal is essential for timing the spark and fuel injection, so a problem here can cause hard starting, stalling, or a no-start condition. The computer sets this code when the crank sensor signal is missing, erratic, or out of its expected pattern. Causes range from a failed sensor or damaged wiring to a problem with the reluctor (tone) ring the sensor reads. Typical repair costs on Kia range from $120 to $450, depending on the specific model and root cause.
Common Causes of P0335
- •Failed crankshaft position sensor
- •Damaged, corroded, or loose sensor wiring/connector
- •Metal debris or oil contamination on the sensor tip
- •Damaged or misaligned reluctor (tone) ring
- •Excessive air gap between sensor and tone ring
- •Wiring shorted or open in the sensor circuit
- •Faulty PCM/ECM (rare)
P0335 on Kia by Model
Kia Forte(1 issue)
- Crankshaft Position Sensor Failure Causing Hot-Restart Stall and Intermittent No-Start (P0335)2010-2018
The CKP sensor on the Forte becomes heat-sensitive as it ages: the signal drops out once the engine bay is hot, so the engine stalls when coming to a stop or at idle, then refuses to restart until it cools for 10-20 minutes. Owners describe the car cranking normally with no spark/injection event and eventually setting P0335 (Crankshaft Position Sensor A Circuit). It is often misdiagnosed as a fuel pump or battery issue because the symptom is intermittent and disappears when the car is cold. Reported across the TD, Koup 2.4 Theta II, and YD/Forte5 cars.
Kia Optima(1 issue)
- Crankshaft Position Sensor Failure Causing Stall or No-Start2001-2002
NHTSA recall 03V-067 covers 2001-2002 Optima vehicles equipped with 2.5L or 2.7L V6 engines. Crankshaft-position-sensor cases did not meet dimensional specifications; internal gaps could let epoxy contact the printed circuit board and crack a capacitor, which could cause the engine to stall.
Kia Rio(1 issue)
- Intermittent No-Start or Engine Stall from Faulty Crankshaft Position Sensor2021-2023
Multiple owners of 2021-2023 Rio models have reported intermittent no-start conditions, sudden stalling, extended cranking, and rough running traced to a failing crankshaft position sensor or its signal circuit. When the sensor drops out, the ECM can lose engine speed reference, causing the engine to shut off or refuse to restart until the sensor cools or the fault becomes permanent. This issue appears in owner complaints and repair discussions for the current-generation Rio and is distinct from injector-related stalling.
Looking for P0335 on a different make?
View P0335 across all makes →Frequently Asked Questions
What does P0335 mean on Kia?▼
P0335 stands for "Crankshaft Position Sensor A Circuit Malfunction." This code means the engine computer has lost or detected a faulty signal from the crankshaft position sensor (sensor A), which tells the computer exactly how fast and in what position the crankshaft is rotating. That signal is essential for timing the spark and fuel injection, so a problem here can cause hard starting, stalling, or a no-start condition. The computer sets this code when the crank sensor signal is missing, erratic, or out of its expected pattern. Causes range from a failed sensor or damaged wiring to a problem with the reluctor (tone) ring the sensor reads. On Kia specifically, this code is documented across 3 models.
What causes P0335 on Kia vehicles?▼
Common causes on Kia: Failed crankshaft position sensor, Damaged, corroded, or loose sensor wiring/connector, Metal debris or oil contamination on the sensor tip, Damaged or misaligned reluctor (tone) ring, Excessive air gap between sensor and tone ring. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0335 on a Kia?▼
Repair costs on Kia range from $120 to $450, depending on the specific model and root cause.
Which Kia models have P0335 documented?▼
Au7o has documented P0335 on 3 Kia models: Forte, Optima, Rio.