P0822

What it means

P0822 is the generic code for a fault in the gear lever Y position sensor circuit. The Y position is the second axis of the gear selector, normally the side-to-side or select movement across the gate. The transmission or powertrain control unit sets it when the sensor signal is out of range, implausible, erratic or does not agree with other inputs such as the gear selected or the shift switch signals.

Symptoms

• Gearbox warning light or engine management light on
• Transmission stuck in one gear or in a limp-home mode
• Gear selection hesitant, harsh or refusing to engage a particular gear
• Gear indicator on the dash missing, wrong or flickering
• Intermittent loss of gear selection that comes and goes with vibration or temperature
• Engine will not start or only starts in park or neutral

Possible causes

• Faulty gear lever or selector position sensor (Y axis) giving a wrong or erratic signallikely
• Damaged, chafed or corroded wiring between the selector sensor and the control unit (open circuit, short to earth or to supply)likely
• Loose, contaminated or corroded connector at the selector assembly or control unitlikely
• Worn, misadjusted or damaged selector mechanism or linkage, so the sensor reads a position that does not match the leverpossible
• Low or unstable supply voltage or poor earth to the sensor, for example from a weak batterypossible
• Faulty transmission or powertrain control unitrare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, and note whether other transmission or network codes are present
2. Check the battery condition and charging voltage, since low voltage can cause false sensor faults
3. Inspect the selector assembly, linkage and wiring for damage, water ingress, chafing or signs of previous repair
4. Check the connectors at the selector and control unit for pins that are loose, bent, corroded or contaminated
5. With a scan tool, watch the live gear lever position data while moving the lever through every gate position and look for dropouts, jumps or values that do not match the lever
6. Check the sensor supply, signal and earth wiring for continuity and shorts against the manufacturer's wiring diagram, and check the sensor supply voltage
7. Check the selector mechanism for wear, play or incorrect adjustment, as the procedure depends on the model and gearbox type
8. If wiring and sensor test fine, check for relevant software updates or service information for the model, and only then consider the control unit

How to fix

• Repair or replace damaged wiring and fix any short or open circuit found
• Clean, repair or replace faulty connectors and terminals
• Replace the gear selector or position sensor assembly if its signal is faulty, as it is often supplied as one unit on many models
• Repair, adjust or replace worn selector linkage or mechanism
• Correct battery, supply or earth faults that are upsetting the sensor signal
• Replace or recode the control unit only after all other causes are ruled out, following the manufacturer's procedure

Can I keep driving?

Nearby codes

• P0821GenericGear Lever X Position Sensor 1 Circuit
• P0823GenericGear Lever X Position Sensor 1 Circuit Intermittent/Erratic