P0705 on Chevrolet
Transmission Range Sensor Circuit Malfunction (PRNDL Input)
P0705 on Chevrolet vehicles indicates transmission range sensor circuit malfunction (prndl input). Au7o has documented this code across 2 Chevrolet models — most commonly on Corvette, Equinox. The transmission range sensor (also called the neutral safety switch or PRNDL switch) tells the computer which gear position the shifter is in (Park, Reverse, Neutral, Drive). P0705 sets when the signal from this sensor is missing, out of range, or inconsistent. Symptoms include no-start in Park, the wrong gear indicator on the dash, harsh or incorrect shifts, and sometimes the engine starting in any gear position. Typical repair costs on Chevrolet range from $120 to $9,000, depending on the specific model and root cause.
Common Causes of P0705
- •Faulty transmission range / neutral safety switch
- •Misadjusted shift linkage or range sensor
- •Damaged or corroded wiring and connectors
- •Poor ground connection
- •Failed PCM or TCM
P0705 on Chevrolet by Model
Chevrolet Corvette(1 issue)
- TR-9080 Dual-Clutch (M1L) Failures, Filter Contamination and Stuck 'Service Transmission' Message2020-2024
The Tremec TR-9080 eight-speed dual-clutch transaxle (RPO M1L) fitted to every C8 has generated a sustained pattern of failures serious enough that GM formally notified NHTSA in November 2021 that it was investigating. The signature complaint is a 'Service Transmission' message that will not clear and that prevents the car from powering off — GM attributed this to debris on the park position sensor magnet feeding an incorrect position reading to the transmission control module. Beyond that, owners report DCT fluid leaks, DCT filters found heavily contaminated well before the 7,500-mile initial service, low-speed shudder during parking-lot maneuvers and 1-2 shifts on early 2020 cars, limp-mode entry, unexpected shifts into neutral while driving, and outright transmission replacement — one NHTSA complaint documents total transmission failure at 1,400 miles, another documents the rear transaxle case cracking and dumping fluid onto the exhaust. GM went so far as to bulletin dealers in November 2021 to collect and return every DCT filter removed at the 7,500-mile service for engineering analysis. The debris findings suggest internal wear material circulating in the unit, not merely a software calibration problem.
Chevrolet Equinox(1 issue)
- Shift-to-Park False Warning From Failing Park-Position Microswitch in Shifter Assembly2018-2024
A widespread, heavily-searched complaint: the driver information center displays "Shift to Park" even though the lever is already fully in Park, and the vehicle then refuses to lock, refuses to allow the key/fob to leave, or will not restart. The root cause is an internal park-position microswitch inside the transmission-control (shifter) assembly whose contacts/actuator arm wear out and stop sending the correct low-voltage signal to the Body Control Module. It is intermittent at first (often heat- or vibration-related) and progresses to a daily no-start/no-lock condition. GM addressed it through service bulletins (e.g. PIT5616 series) rather than a recall, and the official repair is replacement of the entire shifter assembly because the switch is not sold separately. The same defect affects the platform-mate GMC Terrain and many other 2014-2024 GM models, which is why owner forums are full of it.
Looking for P0705 on a different make?
View P0705 across all makes →Frequently Asked Questions
What does P0705 mean on Chevrolet?▼
P0705 stands for "Transmission Range Sensor Circuit Malfunction (PRNDL Input)." The transmission range sensor (also called the neutral safety switch or PRNDL switch) tells the computer which gear position the shifter is in (Park, Reverse, Neutral, Drive). P0705 sets when the signal from this sensor is missing, out of range, or inconsistent. Symptoms include no-start in Park, the wrong gear indicator on the dash, harsh or incorrect shifts, and sometimes the engine starting in any gear position. On Chevrolet specifically, this code is documented across 2 models.
What causes P0705 on Chevrolet vehicles?▼
Common causes on Chevrolet: Faulty transmission range / neutral safety switch, Misadjusted shift linkage or range sensor, Damaged or corroded wiring and connectors, Poor ground connection, Failed PCM or TCM. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0705 on a Chevrolet?▼
Repair costs on Chevrolet range from $120 to $9,000, depending on the specific model and root cause.
Which Chevrolet models have P0705 documented?▼
Au7o has documented P0705 on 2 Chevrolet models: Corvette, Equinox.